fix: oops

Major codebase cleanup

.gitignore

@@ -2,12 +2,15 @@
 
 !/src
 !/src/**/*
-
 /src/assets/js/ts.js
 
+!/doc
+!/doc/**/*
+
 !/tests
 !/tests/**/*
 
+
 !/.github
 !/.github/**/*
 

README.md

@@ -11,7 +11,7 @@ JScript is an engine, capable of running EcmaScript 5, written entirely in Java.
 The following is going to execute a simple javascript statement:
 
 ```java
-var engine = new Engine(false);
+var engine = new Engine();
 // Initialize a standard environment, with implementations of most basic standard libraries (Object, Array, Symbol, etc.)
 var env = Internals.apply(new Environment());
 
@@ -26,4 +26,4 @@ System.out.println(awaitable.await());
 
 ## NOTE:
 
-To setup the typescript bundle in your sources, run `node build.js init-ts`. This will download the latest version of typescript, minify it, and add it to your src/assets folder. If you are going to work with the `node build.js debug|release` command, this is not a necessary step.
+To setup the typescript bundle in your sources, run `node build.js init-ts`. This will download the latest version of typescript, minify it, and add it to your src folder. If you are going to work with the `node build.js debug|release` command, this is not a necessary step.

build.js

@@ -77,6 +77,7 @@ async function downloadTypescript(outFile) {
         console.log('Minifying typescript...');
 
         const minified = minify((await fs.readFile('tmp/typescript-es5.js')).toString());
+        // const minified = { code: (await fs.readFile('tmp/typescript-es5.js')).toString() };
         if (minified.error) throw minified.error;
 
         // Patch unsupported regex syntax
@@ -117,7 +118,7 @@ The following is a minified version of the unmodified Typescript 5.2
 }
 async function compileJava(conf) {
     try {
-        await fs.writeFile('Metadata.java', (await fs.readFile('src/me/topchetoeu/jscript/Metadata.java')).toString()
+        await fs.writeFile('Metadata.java', (await fs.readFile('src/me/topchetoeu/jscript/common/Metadata.java')).toString()
             .replace('${VERSION}', conf.version)
             .replace('${NAME}', conf.name)
             .replace('${AUTHOR}', conf.author)
@@ -135,11 +136,22 @@ async function compileJava(conf) {
         await fs.rm('Metadata.java');
     }
 }
+async function jar(conf, project, mainClass) {
+    const args = [
+        'jar', '-c',
+        '-f', `dst/${project}-v${conf.version}.jar`,
+    ];
+    if (mainClass) args.push('-e', mainClass);
+    args.push('-C', 'dst/classes', project.replaceAll('.', '/'));
+    console.log(args.join(' '));
+
+    await run(true, ...args);
+}
 
 (async () => {
     try {
         if (argv[2] === 'init-ts') {
-            await downloadTypescript('src/assets/js/ts.js');
+            await downloadTypescript('src/me/topchetoeu/jscript/utils/assets/js/ts.js');
         }
         else {
             const conf = {
@@ -155,12 +167,21 @@ async function compileJava(conf) {
             try { await fs.rm('dst', { recursive: true }); } catch {}
 
             await Promise.all([
-                downloadTypescript('dst/classes/assets/js/ts.js'),
-                copy('src', 'dst/classes', v => !v.endsWith('.java')),
+                (async () => {
+                    await copy('src', 'dst/classes', v => !v.endsWith('.java'));
+                    await downloadTypescript('dst/classes/me/topchetoeu/jscript/utils/assets/js/ts.js');
+                })(),
                 compileJava(conf),
             ]);
 
-            await run(true, 'jar', '-c', '-f', 'dst/jscript.jar', '-e', 'me.topchetoeu.jscript.Main', '-C', 'dst/classes', '.');
+            await Promise.all([
+                jar(conf, 'me.topchetoeu.jscript.common'),
+                jar(conf, 'me.topchetoeu.jscript.core'),
+                jar(conf, 'me.topchetoeu.jscript.lib'),
+                jar(conf, 'me.topchetoeu.jscript.utils'),
+                jar(conf, 'me.topchetoeu.jscript', 'me.topchetoeu.jscript.utils.JScriptRepl'),
+            ]);
+
             console.log('Done!');
         }
     }

src/me/topchetoeu/jscript/MessageReceiver.java

@@ -1,6 +0,0 @@
-package me.topchetoeu.jscript;
-
-public interface MessageReceiver {
-    void sendMessage(String msg);
-    void sendError(String msg);
-}

src/me/topchetoeu/jscript/common/Buffer.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 public class Buffer {
     private byte[] data;

src/me/topchetoeu/jscript/common/Filename.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 import java.io.File;
 import java.nio.file.Path;

src/me/topchetoeu/jscript/common/Location.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 public class Location implements Comparable<Location> {
     public static final Location INTERNAL = new Location(0, 0, new Filename("jscript", "native"));

src/me/topchetoeu/jscript/common/Metadata.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 public class Metadata {
     private static final String VERSION = "${VERSION}";

src/me/topchetoeu/jscript/common/Reading.java

@@ -1,25 +1,31 @@
-package me.topchetoeu.jscript;
+package me.topchetoeu.jscript.common;
 
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
-
-import me.topchetoeu.jscript.exceptions.UncheckedException;
+import java.io.UncheckedIOException;
 
 public class Reading {
     private static final BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
 
-    public static synchronized String read() throws IOException {
+    public static synchronized String readline() throws IOException {
         return reader.readLine();
     }
 
+    /**
+     * Reads the given stream to a string
+     * @param in 
+     * @return
+     */
     public static String streamToString(InputStream in) {
-        try { return new String(in.readAllBytes()); }
-        catch (Throwable e) { throw new UncheckedException(e); }
+        try {
+            return new String(in.readAllBytes());
+        }
+        catch (IOException e) { throw new UncheckedIOException(e); }
     }
     public static InputStream resourceToStream(String name) {
-        return Reading.class.getResourceAsStream("/assets/" + name);
+        return Reading.class.getResourceAsStream("/" + name);
     }
     public static String resourceToString(String name) {
         return streamToString(resourceToStream(name));

src/me/topchetoeu/jscript/common/ResultRunnable.java

@@ -0,0 +1,5 @@
+package me.topchetoeu.jscript.common;
+
+public interface ResultRunnable<T> {
+    T run();
+}

src/me/topchetoeu/jscript/common/events/Awaitable.java

@@ -0,0 +1,27 @@
+package me.topchetoeu.jscript.common.events;
+
+public interface Awaitable<T> {
+    public static interface ResultHandler<T> {
+        public void onResult(T data);
+    }
+    public static interface ErrorHandler {
+        public void onError(RuntimeException error);
+    }
+
+    T await();
+
+    default void handle(ResultHandler<T> onResult, ErrorHandler onError) {
+        var thread = new Thread(() -> {
+            try {
+                onResult.onResult(await());
+            }
+            catch (RuntimeException e) {
+                onError.onError(e);
+            }
+        }, "Awaiter");
+        thread.start();
+    }
+    default void handle(ResultHandler<T> onResult) {
+        handle(onResult, err -> {});
+    }
+}

src/me/topchetoeu/jscript/common/events/DataNotifier.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.events;
+package me.topchetoeu.jscript.common.events;
 
 public class DataNotifier<T> implements Awaitable<T> {
     private Notifier notifier = new Notifier();
@@ -11,9 +11,6 @@ public class DataNotifier<T> implements Awaitable<T> {
         isErr = true;
         notifier.next();
     }
-    public void error(Throwable t) {
-        error(new RuntimeException(t));
-    }
     public void next(T val) {
         this.val = val;
         isErr = false;

src/me/topchetoeu/jscript/common/events/Notifier.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.events;
+package me.topchetoeu.jscript.common.events;
 
-import me.topchetoeu.jscript.exceptions.InterruptException;
+import me.topchetoeu.jscript.core.exceptions.InterruptException;
 
 public class Notifier {
     private boolean ok = false;

src/me/topchetoeu/jscript/common/json/JSON.java

@@ -1,20 +1,20 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 import java.util.HashSet;
 import java.util.List;
 import java.util.stream.Collectors;
 
-import me.topchetoeu.jscript.Filename;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
-import me.topchetoeu.jscript.parsing.Operator;
-import me.topchetoeu.jscript.parsing.ParseRes;
-import me.topchetoeu.jscript.parsing.Parsing;
-import me.topchetoeu.jscript.parsing.Token;
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
+import me.topchetoeu.jscript.core.parsing.Operator;
+import me.topchetoeu.jscript.core.parsing.ParseRes;
+import me.topchetoeu.jscript.core.parsing.Parsing;
+import me.topchetoeu.jscript.core.parsing.Token;
 
 public class JSON {
     public static Object toJs(JSONElement val) {
@@ -58,8 +58,8 @@ public class JSON {
 
             var res = new JSONMap();
 
-            for (var el : ((ObjectValue)val).keys(false)) {
-                var jsonEl = fromJs(ctx, ((ObjectValue)val).getMember(ctx, el), prev);
+            for (var el : Values.getMembers(ctx, val, false, false)) {
+                var jsonEl = fromJs(ctx, Values.getMember(ctx, val, el), prev);
                 if (jsonEl == null) continue;
                 if (el instanceof String || el instanceof Number) res.put(el.toString(), jsonEl);
             }

src/me/topchetoeu/jscript/common/json/JSONElement.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 public class JSONElement {
     public static enum Type {

src/me/topchetoeu/jscript/common/json/JSONList.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 import java.util.ArrayList;
 import java.util.Collection;

src/me/topchetoeu/jscript/common/json/JSONMap.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.json;
+package me.topchetoeu.jscript.common.json;
 
 import java.util.Collection;
 import java.util.HashMap;

src/me/topchetoeu/jscript/core/compilation/AssignableStatement.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.engine.Operation;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.Operation;
 
 public abstract class AssignableStatement extends Statement {
     public abstract Statement toAssign(Statement val, Operation operation);

src/me/topchetoeu/jscript/core/compilation/CalculateResult.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public final class CalculateResult {
     public final boolean exists;

src/me/topchetoeu/jscript/core/compilation/CompileTarget.java

@@ -1,14 +1,14 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 import java.util.HashMap;
 import java.util.Map;
 import java.util.TreeSet;
 import java.util.Vector;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
 
 public class CompileTarget {
     public final Vector<Instruction> target = new Vector<>();

src/me/topchetoeu/jscript/core/compilation/CompoundStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 import java.util.List;
 import java.util.Vector;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.values.FunctionStatement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.values.FunctionStatement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class CompoundStatement extends Statement {
     public final Statement[] statements;

src/me/topchetoeu/jscript/core/compilation/FunctionBody.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 public class FunctionBody {
     public final Instruction[] instructions;

src/me/topchetoeu/jscript/core/compilation/Instruction.java

@@ -1,8 +1,8 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class Instruction {
     public static enum Type {

src/me/topchetoeu/jscript/core/compilation/Statement.java

@@ -1,8 +1,8 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public abstract class Statement {
     private Location _loc;

src/me/topchetoeu/jscript/core/compilation/ThrowSyntaxStatement.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class ThrowSyntaxStatement extends Statement {
     public final String name;

src/me/topchetoeu/jscript/core/compilation/VariableDeclareStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation;
+package me.topchetoeu.jscript.core.compilation;
 
 import java.util.List;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.values.FunctionStatement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.values.FunctionStatement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableDeclareStatement extends Statement {
     public static class Pair {

src/me/topchetoeu/jscript/core/compilation/control/BreakStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class BreakStatement extends Statement {
     public final String label;

src/me/topchetoeu/jscript/core/compilation/control/ContinueStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ContinueStatement extends Statement {
     public final String label;

src/me/topchetoeu/jscript/core/compilation/control/DebugStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DebugStatement extends Statement {
     @Override

src/me/topchetoeu/jscript/core/compilation/control/DeleteStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DeleteStatement extends Statement {
     public final Statement key;

src/me/topchetoeu/jscript/core/compilation/control/DoWhileStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DoWhileStatement extends Statement {
     public final Statement condition, body;

src/me/topchetoeu/jscript/core/compilation/control/ForInStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ForInStatement extends Statement {
     public final String varName;

src/me/topchetoeu/jscript/core/compilation/control/ForStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ForStatement extends Statement {
     public final Statement declaration, assignment, condition, body;

src/me/topchetoeu/jscript/core/compilation/control/IfStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class IfStatement extends Statement {
     public final Statement condition, body, elseBody;

src/me/topchetoeu/jscript/core/compilation/control/ReturnStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ReturnStatement extends Statement {
     public final Statement value;

src/me/topchetoeu/jscript/core/compilation/control/SwitchStatement.java

@@ -1,15 +1,15 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
 import java.util.HashMap;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class SwitchStatement extends Statement {
     public static class SwitchCase {

src/me/topchetoeu/jscript/core/compilation/control/ThrowStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ThrowStatement extends Statement {
     public final Statement value;

src/me/topchetoeu/jscript/core/compilation/control/TryStatement.java

@@ -1,13 +1,13 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.GlobalScope;
-import me.topchetoeu.jscript.engine.scope.LocalScopeRecord;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.GlobalScope;
+import me.topchetoeu.jscript.core.engine.scope.LocalScopeRecord;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class TryStatement extends Statement {
     public final Statement tryBody;

src/me/topchetoeu/jscript/core/compilation/control/WhileStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.control;
+package me.topchetoeu.jscript.core.compilation.control;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class WhileStatement extends Statement {
     public final Statement condition, body;

src/me/topchetoeu/jscript/core/compilation/values/ArrayStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ArrayStatement extends Statement {
     public final Statement[] statements;

src/me/topchetoeu/jscript/core/compilation/values/CallStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class CallStatement extends Statement {
     public final Statement func;

src/me/topchetoeu/jscript/core/compilation/values/ChangeStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.AssignableStatement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.AssignableStatement;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ChangeStatement extends Statement {
     public final AssignableStatement value;

src/me/topchetoeu/jscript/core/compilation/values/ConstantStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ConstantStatement extends Statement {
     public final Object value;

src/me/topchetoeu/jscript/core/compilation/values/DiscardStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class DiscardStatement extends Statement {
     public final Statement value;

src/me/topchetoeu/jscript/core/compilation/values/FunctionStatement.java

@@ -1,17 +1,17 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
 import java.util.Random;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.CompoundStatement;
-import me.topchetoeu.jscript.compilation.FunctionBody;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.CompoundStatement;
+import me.topchetoeu.jscript.core.compilation.FunctionBody;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class FunctionStatement extends Statement {
     public final CompoundStatement body;

src/me/topchetoeu/jscript/core/compilation/values/GlobalThisStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class GlobalThisStatement extends Statement {
     @Override public boolean pure() { return true; }

src/me/topchetoeu/jscript/core/compilation/values/IndexAssignStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class IndexAssignStatement extends Statement {
     public final Statement object;

src/me/topchetoeu/jscript/core/compilation/values/IndexStatement.java

@@ -1,13 +1,13 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.AssignableStatement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.Instruction.BreakpointType;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.AssignableStatement;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.compilation.Instruction.BreakpointType;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class IndexStatement extends AssignableStatement {
     public final Statement object;

src/me/topchetoeu/jscript/core/compilation/values/LazyAndStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public class LazyAndStatement extends Statement {
     public final Statement first, second;

src/me/topchetoeu/jscript/core/compilation/values/LazyOrStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public class LazyOrStatement extends Statement {
     public final Statement first, second;

src/me/topchetoeu/jscript/core/compilation/values/ObjectStatement.java

@@ -1,13 +1,13 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
 import java.util.ArrayList;
 import java.util.Map;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class ObjectStatement extends Statement {
     public final Map<Object, Statement> map;

src/me/topchetoeu/jscript/core/compilation/values/OperationStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class OperationStatement extends Statement {
     public final Statement[] args;

src/me/topchetoeu/jscript/core/compilation/values/RegexStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class RegexStatement extends Statement {
     public final String pattern, flags;

src/me/topchetoeu/jscript/core/compilation/values/TypeofStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class TypeofStatement extends Statement {
     public final Statement value;

src/me/topchetoeu/jscript/core/compilation/values/VariableAssignStatement.java

@@ -1,11 +1,11 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableAssignStatement extends Statement {
     public final String name;

src/me/topchetoeu/jscript/core/compilation/values/VariableIndexStatement.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableIndexStatement extends Statement {
     public final int index;

src/me/topchetoeu/jscript/core/compilation/values/VariableStatement.java

@@ -1,12 +1,12 @@
-package me.topchetoeu.jscript.compilation.values;
+package me.topchetoeu.jscript.core.compilation.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.AssignableStatement;
-import me.topchetoeu.jscript.compilation.CompileTarget;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Statement;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ScopeRecord;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.AssignableStatement;
+import me.topchetoeu.jscript.core.compilation.CompileTarget;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Statement;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ScopeRecord;
 
 public class VariableStatement extends AssignableStatement {
     public final String name;

src/me/topchetoeu/jscript/core/engine/Context.java

@@ -0,0 +1,166 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+import java.util.TreeSet;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.lib.EnvironmentLib;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
+
+public class Context implements Extensions {
+    public static final Context NULL = new Context(null);
+
+    public final Context parent;
+    public final Environment environment;
+    public final CodeFrame frame;
+    public final Engine engine;
+    public final int stackSize;
+
+    @Override public <T> void add(Symbol key, T obj) {
+        if (environment != null) environment.add(key, obj);
+        else if (engine != null) engine.add(key, obj);
+    }
+    @Override public <T> T get(Symbol key) {
+        if (environment != null && environment.has(key)) return environment.get(key);
+        else if (engine != null && engine.has(key)) return engine.get(key);
+        return null;
+    }
+    @Override public boolean has(Symbol key) {
+        return
+            environment != null && environment.has(key) ||
+            engine != null && engine.has(key);
+    }
+    @Override public boolean remove(Symbol key) {
+        var res = false;
+
+        if (environment != null) res |= environment.remove(key);
+        else if (engine != null) res |= engine.remove(key);
+
+        return res;
+    }
+    @Override public Iterable<Symbol> keys() {
+        if (engine == null && environment == null) return List.of();
+        if (engine == null) return environment.keys();
+        if (environment == null) return engine.keys();
+
+        return () -> Stream.concat(
+            StreamSupport.stream(engine.keys().spliterator(), false),
+            StreamSupport.stream(environment.keys().spliterator(), false)
+        ).distinct().iterator();
+    }
+
+    public FunctionValue compile(Filename filename, String raw) {
+        var env = environment;
+        var result = Environment.compileFunc(this).call(this, null, raw, filename.toString(), new EnvironmentLib(env));
+
+        var function = (FunctionValue)Values.getMember(this, result, "function");
+        if (!DebugContext.enabled(this)) return function;
+
+        var rawMapChain = ((ArrayValue)Values.getMember(this, result, "mapChain")).toArray();
+        var breakpoints = new TreeSet<>(
+            Arrays.stream(((ArrayValue)Values.getMember(this, result, "breakpoints")).toArray())
+                .map(v -> Location.parse(Values.toString(this, v)))
+                .collect(Collectors.toList())
+        );
+        var maps = new SourceMap[rawMapChain.length];
+
+        for (var i = 0; i < maps.length; i++) maps[i] = SourceMap.parse(Values.toString(this, (String)rawMapChain[i]));
+
+        var map = SourceMap.chain(maps);
+
+        if (map != null) {
+            var newBreakpoints = new TreeSet<Location>();
+            for (var bp : breakpoints) {
+                bp = map.toCompiled(bp);
+                if (bp != null) newBreakpoints.add(bp);
+            }
+            breakpoints = newBreakpoints;
+        }
+
+        DebugContext.get(this).onSource(filename, raw, breakpoints, map);
+
+        return function;
+    }
+
+    public Context pushFrame(CodeFrame frame) {
+        var res = new Context(this, frame.function.environment, frame, engine, stackSize + 1);
+        return res;
+    }
+
+    public Iterable<CodeFrame> frames() {
+        var self = this;
+        return () -> new Iterator<CodeFrame>() {
+            private Context curr = self;
+
+            private void update() {
+                while (curr != null && curr.frame == null) curr = curr.parent;
+            }
+
+            @Override public boolean hasNext() {
+                update();
+                return curr != null;
+            }
+            @Override public CodeFrame next() {
+                update();
+                var res = curr.frame;
+                curr = curr.parent;
+                return res;
+            }
+        };
+    }
+    public List<String> stackTrace() {
+        var res = new ArrayList<String>();
+
+        for (var el : frames()) {
+            var name = el.function.name;
+            Location loc = null;
+
+            for (var j = el.codePtr; j >= 0 && loc == null; j--) loc = el.function.body[j].location;
+            if (loc == null) loc = el.function.loc();
+
+            var trace = "";
+
+            if (loc != null) trace += "at " + loc.toString() + " ";
+            if (name != null && !name.equals("")) trace += "in " + name + " ";
+
+            trace = trace.trim();
+
+            if (!trace.equals("")) res.add(trace);
+        }
+
+        return res;
+    }
+
+    private Context(Context parent, Environment environment, CodeFrame frame, Engine engine, int stackSize) {
+        this.parent = parent;
+        this.environment = environment;
+        this.frame = frame;
+        this.engine = engine;
+        this.stackSize = stackSize;
+
+        if (hasNotNull(Environment.MAX_STACK_COUNT) && stackSize > (int)get(Environment.MAX_STACK_COUNT)) {
+            throw EngineException.ofRange("Stack overflow!");
+        }
+    }
+
+    public Context(Engine engine) {
+        this(null, null, null, engine, 0);
+    }
+    public Context(Engine engine, Environment env) {
+        this(null, env, null, engine, 0);
+    }
+}

src/me/topchetoeu/jscript/core/engine/Engine.java

@@ -0,0 +1,57 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.HashMap;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.events.Awaitable;
+import me.topchetoeu.jscript.core.compilation.FunctionBody;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+
+public class Engine extends EventLoop implements Extensions {
+    public static final HashMap<Long, FunctionBody> functions = new HashMap<>();
+
+    private final Environment env = new Environment();
+
+    @Override
+    public <T> void add(Symbol key, T obj) {
+        this.env.add(key, obj);
+    }
+    @Override
+    public <T> T get(Symbol key) {
+        return this.env.get(key);
+    }
+    @Override
+    public boolean has(Symbol key) {
+        return this.env.has(key);
+    }
+    @Override
+    public boolean remove(Symbol key) {
+        return this.env.remove(key);
+    }
+    @Override
+    public Iterable<Symbol> keys() {
+        return env.keys();
+    }
+
+    public Engine copy() {
+        var res = new Engine();
+        res.env.addAll(env);
+        return res;
+    }
+
+    public Awaitable<Object> pushMsg(boolean micro, Environment env, FunctionValue func, Object thisArg, Object ...args) {
+        return pushMsg(() -> {
+            return func.call(new Context(this, env), thisArg, args);
+        }, micro);
+    }
+    public Awaitable<Object> pushMsg(boolean micro, Environment env, Filename filename, String raw, Object thisArg, Object ...args) {
+        return pushMsg(() -> {
+            var ctx = new Context(this, env);
+            return ctx.compile(filename, raw).call(new Context(this, env), thisArg, args);
+        }, micro);
+    }
+
+    public Engine() {
+    }
+}

src/me/topchetoeu/jscript/core/engine/Environment.java

@@ -0,0 +1,128 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.HashMap;
+import java.util.stream.Collectors;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.scope.GlobalScope;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.NativeFunction;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.parsing.Parsing;
+import me.topchetoeu.jscript.utils.interop.NativeWrapperProvider;
+
+@SuppressWarnings("unchecked")
+public class Environment implements Extensions {
+
+    public static final HashMap<String, Symbol> symbols = new HashMap<>();
+
+    public static final Symbol WRAPPERS = Symbol.get("Environment.wrappers");
+    public static final Symbol COMPILE_FUNC = Symbol.get("Environment.compile");
+
+    public static final Symbol REGEX_CONSTR = Symbol.get("Environment.regexConstructor");
+    public static final Symbol STACK = Symbol.get("Environment.stack");
+    public static final Symbol MAX_STACK_COUNT = Symbol.get("Environment.maxStackCount");
+    public static final Symbol HIDE_STACK = Symbol.get("Environment.hideStack");
+
+    public static final Symbol OBJECT_PROTO = Symbol.get("Environment.objectPrototype");
+    public static final Symbol FUNCTION_PROTO = Symbol.get("Environment.functionPrototype");
+    public static final Symbol ARRAY_PROTO = Symbol.get("Environment.arrayPrototype");
+    public static final Symbol BOOL_PROTO = Symbol.get("Environment.boolPrototype");
+    public static final Symbol NUMBER_PROTO = Symbol.get("Environment.numberPrototype");
+    public static final Symbol STRING_PROTO = Symbol.get("Environment.stringPrototype");
+    public static final Symbol SYMBOL_PROTO = Symbol.get("Environment.symbolPrototype");
+    public static final Symbol ERROR_PROTO = Symbol.get("Environment.errorPrototype");
+    public static final Symbol SYNTAX_ERR_PROTO = Symbol.get("Environment.syntaxErrorPrototype");
+    public static final Symbol TYPE_ERR_PROTO = Symbol.get("Environment.typeErrorPrototype");
+    public static final Symbol RANGE_ERR_PROTO = Symbol.get("Environment.rangeErrorPrototype");
+
+    private HashMap<Symbol, Object> data = new HashMap<>();
+
+    public GlobalScope global;
+    public WrapperProvider wrappers;
+
+    @Override public <T> void add(Symbol key, T obj) {
+        data.put(key, obj);
+    }
+    @Override public <T> T get(Symbol key) {
+        return (T)data.get(key);
+    }
+    @Override public boolean remove(Symbol key) {
+        if (data.containsKey(key)) {
+            data.remove(key);
+            return true;
+        }
+        return false;
+    }
+    @Override public boolean has(Symbol key) {
+        return data.containsKey(key);
+    }
+    @Override public Iterable<Symbol> keys() {
+        return data.keySet();
+    }
+
+    public static FunctionValue compileFunc(Extensions ext) {
+        return ext.init(COMPILE_FUNC, new NativeFunction("compile", args -> {
+            var source = args.getString(0);
+            var filename = args.getString(1);
+            var env = Values.wrapper(Values.getMember(args.ctx, args.get(2), Symbol.get("env")), Environment.class);
+            var isDebug = DebugContext.enabled(args.ctx);
+            var res = new ObjectValue();
+
+            var target = Parsing.compile(env, Filename.parse(filename), source);
+            Engine.functions.putAll(target.functions);
+            Engine.functions.remove(0l);
+
+            res.defineProperty(args.ctx, "function", target.func(env));
+            res.defineProperty(args.ctx, "mapChain", new ArrayValue());
+
+            if (isDebug) res.defineProperty(
+                args.ctx, "breakpoints",
+                ArrayValue.of(args.ctx, target.breakpoints.stream().map(Location::toString).collect(Collectors.toList()))
+            );
+
+            return res;
+        }));
+    }
+    public static FunctionValue regexConstructor(Extensions ext) {
+        return ext.init(COMPILE_FUNC, new NativeFunction("RegExp", args -> {
+            throw EngineException.ofError("Regular expressions not supported.").setCtx(args.ctx.environment, args.ctx.engine);
+        }));
+    }
+
+    public Environment copy() {
+        var res = new Environment(null, global);
+
+        res.wrappers = wrappers.fork(res);
+        res.global = global;
+        res.data.putAll(data);
+
+        return res;
+    }
+    public Environment child() {
+        var res = copy();
+        res.global = res.global.globalChild();
+        return res;
+    }
+
+    public Context context(Engine engine) {
+        return new Context(engine, this);
+    }
+
+    public Environment(WrapperProvider nativeConverter, GlobalScope global) {
+        if (nativeConverter == null) nativeConverter = new NativeWrapperProvider(this);
+        if (global == null) global = new GlobalScope();
+
+        this.wrappers = nativeConverter;
+        this.global = global;
+    }
+    public Environment() {
+        this(null, null);
+    }
+}

src/me/topchetoeu/jscript/core/engine/EventLoop.java

@@ -0,0 +1,81 @@
+package me.topchetoeu.jscript.core.engine;
+
+import java.util.concurrent.PriorityBlockingQueue;
+
+import me.topchetoeu.jscript.common.ResultRunnable;
+import me.topchetoeu.jscript.common.events.Awaitable;
+import me.topchetoeu.jscript.common.events.DataNotifier;
+import me.topchetoeu.jscript.core.exceptions.InterruptException;
+
+public class EventLoop {
+    private static class Task implements Comparable<Task> {
+        public final ResultRunnable<?> runnable;
+        public final DataNotifier<Object> notifier = new DataNotifier<>();
+        public final boolean micro;
+
+        public Task(ResultRunnable<?> runnable, boolean micro) {
+            this.runnable = runnable;
+            this.micro = micro;
+        }
+
+        @Override
+        public int compareTo(Task other) {
+            return Integer.compare(this.micro ? 0 : 1, other.micro ? 0 : 1);
+        }
+    }
+
+    private PriorityBlockingQueue<Task> tasks = new PriorityBlockingQueue<>();
+    private Thread thread;
+
+    @SuppressWarnings("unchecked")
+    public <T> Awaitable<T> pushMsg(ResultRunnable<T> runnable, boolean micro) {
+        var msg = new Task(runnable, micro);
+        tasks.add(msg);
+        return (Awaitable<T>)msg.notifier;
+    }
+    public Awaitable<Object> pushMsg(Runnable runnable, boolean micro) {
+        return pushMsg(() -> { runnable.run(); return null; }, micro);
+    }
+
+    public void run(boolean untilEmpty) {
+        while (!untilEmpty || !tasks.isEmpty()) {
+            try {
+                var task = tasks.take();
+
+                try {
+                    task.notifier.next(task.runnable.run());
+                }
+                catch (RuntimeException e) {
+                    if (e instanceof InterruptException) throw e;
+                    task.notifier.error(e);
+                }
+            }
+            catch (InterruptedException | InterruptException e) {
+                for (var msg : tasks) msg.notifier.error(new InterruptException(e));
+                break;
+            }
+        }
+    }
+
+    public Thread thread() {
+        return thread;
+    }
+    public Thread start() {
+        if (thread == null) {
+            thread = new Thread(() -> run(false), "Event loop #" + hashCode());
+            thread.start();
+        }
+        return thread;
+    }
+    public void stop() {
+        if (thread != null) thread.interrupt();
+        thread = null;
+    }
+
+    public boolean inLoopThread() {
+        return Thread.currentThread() == thread;
+    }
+    public boolean isRunning() {
+        return this.thread != null;
+    }
+}

src/me/topchetoeu/jscript/core/engine/Extensions.java

@@ -0,0 +1,34 @@
+package me.topchetoeu.jscript.core.engine;
+
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+
+public interface Extensions {
+    <T> T get(Symbol key);
+    <T> void add(Symbol key, T obj);
+    Iterable<Symbol> keys();
+
+    boolean has(Symbol key);
+    boolean remove(Symbol key);
+
+    default boolean hasNotNull(Symbol key) {
+        return has(key) && get(key) != null;
+    }
+
+    default <T> T get(Symbol key, T defaultVal) {
+        if (has(key)) return get(key);
+        else return defaultVal;
+    }
+
+    default <T> T init(Symbol key, T val) {
+        if (has(key)) return get(key);
+        else {
+            add(key, val);
+            return val;
+        }
+    }
+    default void addAll(Extensions source) {
+        for (var key : source.keys()) {
+            add(key, source.get(key));
+        }
+    }
+}

src/me/topchetoeu/jscript/core/engine/Operation.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine;
+package me.topchetoeu.jscript.core.engine;
 
 public enum Operation {
     INSTANCEOF(2, false),

src/me/topchetoeu/jscript/core/engine/WrapperProvider.java

@@ -0,0 +1,12 @@
+package me.topchetoeu.jscript.core.engine;
+
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+
+public interface WrapperProvider {
+    public ObjectValue getProto(Class<?> obj);
+    public ObjectValue getNamespace(Class<?> obj);
+    public FunctionValue getConstr(Class<?> obj);
+
+    public WrapperProvider fork(Environment env);
+}

src/me/topchetoeu/jscript/core/engine/debug/DebugContext.java

@@ -0,0 +1,100 @@
+package me.topchetoeu.jscript.core.engine.debug;
+
+import java.util.HashMap;
+import java.util.TreeSet;
+
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Extensions;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
+
+public class DebugContext implements DebugController {
+    public static final Symbol ENV_KEY = Symbol.get("Engine.debug");
+    public static final Symbol IGNORE = Symbol.get("Engine.ignoreDebug");
+
+    private HashMap<Filename, String> sources;
+    private HashMap<Filename, TreeSet<Location>> bpts;
+    private HashMap<Filename, SourceMap> maps;
+    private DebugController debugger;
+
+    public boolean attachDebugger(DebugController debugger) {
+        if (this.debugger != null) return false;
+
+        if (sources != null) {
+            for (var source : sources.entrySet()) debugger.onSource(
+                source.getKey(), source.getValue(),
+                bpts.get(source.getKey()),
+                maps.get(source.getKey())
+            );
+        }
+
+        this.debugger = debugger;
+        return true;
+    }
+    public boolean detachDebugger() {
+        this.debugger = null;
+        return true;
+    }
+
+    public DebugController debugger() {
+        if (debugger == null) return DebugController.empty();
+        else return debugger;
+    }
+
+    @Override public void onFramePop(Context ctx, CodeFrame frame) {
+        if (debugger != null) debugger.onFramePop(ctx, frame);
+    }
+    @Override public void onFramePush(Context ctx, CodeFrame frame) {
+        if (debugger != null) debugger.onFramePush(ctx, frame);
+    }
+    @Override public boolean onInstruction(Context ctx, CodeFrame frame, Instruction instruction, Object returnVal, EngineException error, boolean caught) {
+        if (debugger != null) return debugger.onInstruction(ctx, frame, instruction, returnVal, error, caught);
+        else return false;
+    }
+    @Override public void onSource(Filename filename, String source, TreeSet<Location> breakpoints, SourceMap map) {
+        if (debugger != null) debugger.onSource(filename, source, breakpoints, map);
+        if (sources != null) sources.put(filename, source);
+        if (bpts != null) bpts.put(filename, breakpoints);
+        if (maps != null) maps.put(filename, map);
+    }
+
+    public Location mapToCompiled(Location location) {
+        if (maps == null) return location;
+
+        var map = maps.get(location.filename());
+        if (map == null) return location;
+        return map.toCompiled(location);
+    }
+    public Location mapToOriginal(Location location) {
+        if (maps == null) return location;
+
+        var map = maps.get(location.filename());
+        if (map == null) return location;
+        return map.toOriginal(location);
+    }
+
+    private DebugContext(boolean enabled) {
+        if (enabled) {
+            sources = new HashMap<>();
+            bpts = new HashMap<>();
+            maps = new HashMap<>();
+        }
+    }
+
+    public DebugContext() {
+        this(true);
+    }
+
+    public static boolean enabled(Extensions exts) {
+        return exts.hasNotNull(ENV_KEY) && !exts.has(IGNORE);
+    }
+    public static DebugContext get(Extensions exts) {
+        if (enabled(exts)) return exts.get(ENV_KEY);
+        else return new DebugContext(false);
+    }
+}

src/me/topchetoeu/jscript/core/engine/debug/DebugController.java

@@ -1,14 +1,14 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 import java.util.TreeSet;
 
-import me.topchetoeu.jscript.Filename;
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.frame.CodeFrame;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.mapping.SourceMap;
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
 
 public interface DebugController {
     /**
@@ -27,7 +27,7 @@ public interface DebugController {
      * @param frame The frame in which execution is occuring
      * @param instruction The instruction which was or will be executed
      * @param loc The most recent location the code frame has been at
-     * @param returnVal The return value of the instruction, Runners.NO_RETURN if none
+     * @param returnVal The return value of the instruction, Values.NO_RETURN if none
      * @param error The error that the instruction threw, null if none
      * @param caught Whether or not the error has been caught
      * @return Whether or not the frame should restart
@@ -48,4 +48,15 @@ public interface DebugController {
      * @param frame The code frame which was popped out
      */
     void onFramePop(Context ctx, CodeFrame frame);
+
+    public static DebugController empty() {
+        return new DebugController () {
+            @Override public void onFramePop(Context ctx, CodeFrame frame) { }
+            @Override public void onFramePush(Context ctx, CodeFrame frame) { }
+            @Override public boolean onInstruction(Context ctx, CodeFrame frame, Instruction instruction, Object returnVal, EngineException error, boolean caught) {
+                return false;
+            }
+            @Override public void onSource(Filename filename, String source, TreeSet<Location> breakpoints, SourceMap map) { }
+        };
+    }
 }

src/me/topchetoeu/jscript/core/engine/debug/DebugHandler.java

@@ -0,0 +1,33 @@
+package me.topchetoeu.jscript.core.engine.debug;
+
+import java.io.IOException;
+
+public interface DebugHandler {
+    void enable(V8Message msg) throws IOException;
+    void disable(V8Message msg) throws IOException;
+
+    void setBreakpointByUrl(V8Message msg) throws IOException;
+    void removeBreakpoint(V8Message msg) throws IOException;
+    void continueToLocation(V8Message msg) throws IOException;
+
+    void getScriptSource(V8Message msg) throws IOException;
+    void getPossibleBreakpoints(V8Message msg) throws IOException;
+
+    void resume(V8Message msg) throws IOException;
+    void pause(V8Message msg) throws IOException;
+
+    void stepInto(V8Message msg) throws IOException;
+    void stepOut(V8Message msg) throws IOException;
+    void stepOver(V8Message msg) throws IOException;
+
+    void setPauseOnExceptions(V8Message msg) throws IOException;
+
+    void evaluateOnCallFrame(V8Message msg) throws IOException;
+
+    void getProperties(V8Message msg) throws IOException;
+    void releaseObjectGroup(V8Message msg) throws IOException;
+    void releaseObject(V8Message msg) throws IOException;
+    void callFunctionOn(V8Message msg) throws IOException;
+
+    void runtimeEnable(V8Message msg) throws IOException;
+}

src/me/topchetoeu/jscript/core/engine/debug/DebugServer.java

@@ -1,6 +1,7 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 import java.io.IOException;
+import java.io.UncheckedIOException;
 import java.net.InetSocketAddress;
 import java.net.ServerSocket;
 import java.net.Socket;
@@ -8,16 +9,14 @@ import java.security.MessageDigest;
 import java.util.Base64;
 import java.util.HashMap;
 
-import me.topchetoeu.jscript.Metadata;
-import me.topchetoeu.jscript.Reading;
-import me.topchetoeu.jscript.engine.debug.WebSocketMessage.Type;
-import me.topchetoeu.jscript.events.Notifier;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
-import me.topchetoeu.jscript.exceptions.UncheckedException;
-import me.topchetoeu.jscript.exceptions.UncheckedIOException;
-import me.topchetoeu.jscript.json.JSON;
-import me.topchetoeu.jscript.json.JSONList;
-import me.topchetoeu.jscript.json.JSONMap;
+import me.topchetoeu.jscript.common.Metadata;
+import me.topchetoeu.jscript.common.Reading;
+import me.topchetoeu.jscript.common.events.Notifier;
+import me.topchetoeu.jscript.common.json.JSON;
+import me.topchetoeu.jscript.common.json.JSONList;
+import me.topchetoeu.jscript.common.json.JSONMap;
+import me.topchetoeu.jscript.core.engine.debug.WebSocketMessage.Type;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 
 public class DebugServer {
     public static String browserDisplayName = Metadata.name() + "/" + Metadata.version();
@@ -36,8 +35,7 @@ public class DebugServer {
         try {
             return MessageDigest.getInstance("sha1");
         }
-        catch (Throwable e) { throw new UncheckedException(e); }
-
+        catch (Throwable e) { throw new RuntimeException(e); }
     }
 
     private static Thread runAsync(Runnable func, String name) {
@@ -47,11 +45,9 @@ public class DebugServer {
         return res;
     }
 
-    private void handle(WebSocket ws, Debugger debugger) {
+    private void handle(WebSocket ws, Debugger debugger) throws IOException {
         WebSocketMessage raw;
 
-        debugger.connect();
-
         while ((raw = ws.receive()) != null) {
             if (raw.type != Type.Text) {
                 ws.send(new V8Error("Expected a text message."));
@@ -68,55 +64,50 @@ public class DebugServer {
                 return;
             }
 
-            try {
-                switch (msg.name) {
-                    case "Debugger.enable":
-                        connNotifier.next();
-                        debugger.enable(msg); continue;
-                    case "Debugger.disable": debugger.disable(msg); continue;
+            switch (msg.name) {
+                case "Debugger.enable":
+                    connNotifier.next();
+                    debugger.enable(msg);
+                    continue;
+                case "Debugger.disable": debugger.close(); continue;
 
-                    case "Debugger.setBreakpointByUrl": debugger.setBreakpointByUrl(msg); continue;
-                    case "Debugger.removeBreakpoint": debugger.removeBreakpoint(msg); continue;
-                    case "Debugger.continueToLocation": debugger.continueToLocation(msg); continue;
+                case "Debugger.setBreakpointByUrl": debugger.setBreakpointByUrl(msg); continue;
+                case "Debugger.removeBreakpoint": debugger.removeBreakpoint(msg); continue;
+                case "Debugger.continueToLocation": debugger.continueToLocation(msg); continue;
 
-                    case "Debugger.getScriptSource": debugger.getScriptSource(msg); continue;
-                    case "Debugger.getPossibleBreakpoints": debugger.getPossibleBreakpoints(msg); continue;
+                case "Debugger.getScriptSource": debugger.getScriptSource(msg); continue;
+                case "Debugger.getPossibleBreakpoints": debugger.getPossibleBreakpoints(msg); continue;
 
-                    case "Debugger.resume": debugger.resume(msg); continue;
-                    case "Debugger.pause": debugger.pause(msg); continue;
+                case "Debugger.resume": debugger.resume(msg); continue;
+                case "Debugger.pause": debugger.pause(msg); continue;
 
-                    case "Debugger.stepInto": debugger.stepInto(msg); continue;
-                    case "Debugger.stepOut": debugger.stepOut(msg); continue;
-                    case "Debugger.stepOver": debugger.stepOver(msg); continue;
+                case "Debugger.stepInto": debugger.stepInto(msg); continue;
+                case "Debugger.stepOut": debugger.stepOut(msg); continue;
+                case "Debugger.stepOver": debugger.stepOver(msg); continue;
 
-                    case "Debugger.setPauseOnExceptions": debugger.setPauseOnExceptions(msg); continue;
-                    case "Debugger.evaluateOnCallFrame": debugger.evaluateOnCallFrame(msg); continue;
+                case "Debugger.setPauseOnExceptions": debugger.setPauseOnExceptions(msg); continue;
+                case "Debugger.evaluateOnCallFrame": debugger.evaluateOnCallFrame(msg); continue;
 
-                    case "Runtime.releaseObjectGroup": debugger.releaseObjectGroup(msg); continue;
-                    case "Runtime.releaseObject": debugger.releaseObject(msg); continue;
-                    case "Runtime.getProperties": debugger.getProperties(msg); continue;
-                    case "Runtime.callFunctionOn": debugger.callFunctionOn(msg); continue;
-                    // case "NodeWorker.enable": debugger.nodeWorkerEnable(msg); continue;
-                    case "Runtime.enable": debugger.runtimeEnable(msg); continue;
-                }
-
-                if (
-                    msg.name.startsWith("DOM.") ||
-                    msg.name.startsWith("DOMDebugger.") ||
-                    msg.name.startsWith("Emulation.") ||
-                    msg.name.startsWith("Input.") ||
-                    msg.name.startsWith("Network.") ||
-                    msg.name.startsWith("Page.")
-                ) ws.send(new V8Error("This isn't a browser..."));
-                else ws.send(new V8Error("This API is not supported yet."));
-            }
-            catch (Throwable e) {
-                e.printStackTrace();
-                throw new UncheckedException(e);
+                case "Runtime.releaseObjectGroup": debugger.releaseObjectGroup(msg); continue;
+                case "Runtime.releaseObject": debugger.releaseObject(msg); continue;
+                case "Runtime.getProperties": debugger.getProperties(msg); continue;
+                case "Runtime.callFunctionOn": debugger.callFunctionOn(msg); continue;
+                // case "NodeWorker.enable": debugger.nodeWorkerEnable(msg); continue;
+                case "Runtime.enable": debugger.runtimeEnable(msg); continue;
             }
+
+            if (
+                msg.name.startsWith("DOM.") ||
+                msg.name.startsWith("DOMDebugger.") ||
+                msg.name.startsWith("Emulation.") ||
+                msg.name.startsWith("Input.") ||
+                msg.name.startsWith("Network.") ||
+                msg.name.startsWith("Page.")
+            ) ws.send(new V8Error("This isn't a browser..."));
+            else ws.send(new V8Error("This API is not supported yet."));
         }
 
-        debugger.disconnect();
+        debugger.close();
     }
     private void onWsConnect(HttpRequest req, Socket socket, DebuggerProvider debuggerProvider) {
         var key = req.headers.get("sec-websocket-key");
@@ -148,10 +139,13 @@ public class DebugServer {
 
         runAsync(() -> {
             try { handle(ws, debugger); }
-            catch (RuntimeException e) {
-                ws.send(new V8Error(e.getMessage()));
+            catch (RuntimeException | IOException e) {
+                try {
+                    ws.send(new V8Error(e.getMessage()));
+                }
+                catch (IOException e2) { /* Shit outta luck */ }
             }
-            finally { ws.close(); debugger.disconnect(); }
+            finally { ws.close(); debugger.close(); }
         }, "Debug Handler");
     }
 
@@ -232,14 +226,16 @@ public class DebugServer {
 
     public DebugServer() {
         try {
-            this.favicon = Reading.resourceToStream("debugger/favicon.png").readAllBytes();
-            this.protocol = Reading.resourceToStream("debugger/protocol.json").readAllBytes();
-            this.index = Reading.resourceToString("debugger/index.html")
+            this.favicon = Reading.resourceToStream("me/topchetoeu/jscript/utils/assets/debugger/favicon.png").readAllBytes();
+            this.protocol = Reading.resourceToStream("me/topchetoeu/jscript/utils/assets/debugger/protocol.json").readAllBytes();
+            this.index = Reading.resourceToString("me/topchetoeu/jscript/utils/assets/debugger/index.html")
                 .replace("${NAME}", Metadata.name())
                 .replace("${VERSION}", Metadata.version())
                 .replace("${AUTHOR}", Metadata.author())
                 .getBytes();
         }
-        catch (IOException e) { throw new UncheckedIOException(e); }
+        catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
     }
 }

src/me/topchetoeu/jscript/core/engine/debug/Debugger.java

@@ -0,0 +1,5 @@
+package me.topchetoeu.jscript.core.engine.debug;
+
+public interface Debugger extends DebugHandler, DebugController {
+    void close();
+}

src/me/topchetoeu/jscript/core/engine/debug/DebuggerProvider.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 public interface DebuggerProvider {
     Debugger getDebugger(WebSocket socket, HttpRequest req);

src/me/topchetoeu/jscript/core/engine/debug/HttpRequest.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 import java.io.BufferedReader;
 import java.io.IOException;

src/me/topchetoeu/jscript/core/engine/debug/SimpleDebugger.java

@@ -1,5 +1,6 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -9,29 +10,29 @@ import java.util.TreeSet;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
-import me.topchetoeu.jscript.Filename;
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.compilation.Instruction.Type;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Engine;
-import me.topchetoeu.jscript.engine.frame.CodeFrame;
-import me.topchetoeu.jscript.engine.frame.Runners;
-import me.topchetoeu.jscript.engine.scope.GlobalScope;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
-import me.topchetoeu.jscript.engine.values.FunctionValue;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Symbol;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.events.Notifier;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.json.JSON;
-import me.topchetoeu.jscript.json.JSONElement;
-import me.topchetoeu.jscript.json.JSONList;
-import me.topchetoeu.jscript.json.JSONMap;
-import me.topchetoeu.jscript.mapping.SourceMap;
-import me.topchetoeu.jscript.parsing.Parsing;
+import me.topchetoeu.jscript.common.Filename;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.common.events.Notifier;
+import me.topchetoeu.jscript.common.json.JSON;
+import me.topchetoeu.jscript.common.json.JSONElement;
+import me.topchetoeu.jscript.common.json.JSONList;
+import me.topchetoeu.jscript.common.json.JSONMap;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.compilation.Instruction.Type;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Engine;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.scope.GlobalScope;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.parsing.Parsing;
+import me.topchetoeu.jscript.utils.mapping.SourceMap;
 
 // very simple indeed
 public class SimpleDebugger implements Debugger {
@@ -109,34 +110,47 @@ public class SimpleDebugger implements Debugger {
         public ObjectValue local, capture, global, valstack;
         public JSONMap serialized;
         public Location location;
-        public boolean debugData = false;
 
         public void updateLoc(Location loc) {
             if (loc == null) return;
             this.location = loc;
         }
 
-        public Frame(Context ctx, CodeFrame frame, int id) {
+        public Frame(CodeFrame frame, int id) {
             this.frame = frame;
             this.func = frame.function;
             this.id = id;
 
             this.global = frame.function.environment.global.obj;
-            this.local = frame.getLocalScope(ctx, true);
-            this.capture = frame.getCaptureScope(ctx, true);
-            this.local.setPrototype(ctx, capture);
-            this.capture.setPrototype(ctx, global);
-            this.valstack = frame.getValStackScope(ctx);
-            debugData = true;
+            this.local = frame.getLocalScope(true);
+            this.capture = frame.getCaptureScope(true);
+            Values.makePrototypeChain(frame.ctx, global, capture, local);
+            this.valstack = frame.getValStackScope();
 
             this.serialized = new JSONMap()
                 .set("callFrameId", id + "")
                 .set("functionName", func.name)
                 .set("scopeChain", new JSONList()
-                    .add(new JSONMap().set("type", "local").set("name", "Local Scope").set("object", serializeObj(ctx, local)))
-                    .add(new JSONMap().set("type", "closure").set("name", "Closure").set("object", serializeObj(ctx, capture)))
-                    .add(new JSONMap().set("type", "global").set("name", "Global Scope").set("object", serializeObj(ctx, global)))
-                    .add(new JSONMap().set("type", "other").set("name", "Value Stack").set("object", serializeObj(ctx, valstack)))
+                    .add(new JSONMap()
+                        .set("type", "local")
+                        .set("name", "Local Scope")
+                        .set("object", serializeObj(frame.ctx, local))
+                    )
+                    .add(new JSONMap()
+                        .set("type", "closure")
+                        .set("name", "Closure")
+                        .set("object", serializeObj(frame.ctx, capture))
+                    )
+                    .add(new JSONMap()
+                        .set("type", "global")
+                        .set("name", "Global Scope")
+                        .set("object", serializeObj(frame.ctx, global))
+                    )
+                    .add(new JSONMap()
+                        .set("type", "other")
+                        .set("name", "Value Stack")
+                        .set("object", serializeObj(frame.ctx, valstack))
+                    )
                 );
         }
     }
@@ -173,7 +187,6 @@ public class SimpleDebugger implements Debugger {
     public State state = State.RESUMED;
 
     public final WebSocket ws;
-    public final Engine target;
 
     private ObjectValue emptyObject = new ObjectValue();
 
@@ -232,26 +245,29 @@ public class SimpleDebugger implements Debugger {
         return nextId++;
     }
 
-    private synchronized void updateFrames(Context ctx) {
-        var frame = ctx.peekFrame();
-        if (frame == null) return;
-
+    private synchronized Frame getFrame(CodeFrame frame) {
         if (!codeFrameToFrame.containsKey(frame)) {
             var id = nextId();
-            var fr = new Frame(ctx, frame, id);
+            var fr = new Frame(frame, id);
 
             idToFrame.put(id, fr);
             codeFrameToFrame.put(frame, fr);
-        }
 
-        currFrame = codeFrameToFrame.get(frame);
+            return fr;
+        }
+        else return codeFrameToFrame.get(frame);
+    }
+    private synchronized void updateFrames(Context ctx) {
+        var frame = ctx.frame;
+        if (frame == null) return;
+
+        currFrame = getFrame(frame);
     }
     private JSONList serializeFrames(Context ctx) {
         var res = new JSONList();
-        var frames = ctx.frames();
 
-        for (var i = frames.size() - 1; i >= 0; i--) {
-            var frame = codeFrameToFrame.get(frames.get(i));
+        for (var el : ctx.frames()) {
+            var frame = getFrame(el);
             if (frame.location == null) continue;
             frame.serialized.set("location", serializeLocation(frame.location));
             if (frame.location != null) res.add(frame.serialized);
@@ -302,6 +318,8 @@ public class SimpleDebugger implements Debugger {
     }
     private JSONMap serializeObj(Context ctx, Object val, boolean byValue) {
         val = Values.normalize(null, val);
+        ctx = new Context(ctx.engine.copy(), ctx.environment);
+        ctx.engine.add(DebugContext.IGNORE, true);
 
         if (val == Values.NULL) {
             return new JSONMap()
@@ -341,7 +359,7 @@ public class SimpleDebugger implements Debugger {
                 try {
                     defaultToString =
                         Values.getMember(ctx, obj, "toString") ==
-                        Values.getMember(ctx, ctx.environment().proto("object"), "toString");
+                        Values.getMember(ctx, ctx.get(Environment.OBJECT_PROTO), "toString");
                 }
                 catch (Exception e) { }
 
@@ -435,55 +453,85 @@ public class SimpleDebugger implements Debugger {
     }
 
     private void resume(State state) {
-        this.state = state;
-        ws.send(new V8Event("Debugger.resumed", new JSONMap()));
-        updateNotifier.next();
+        try {
+            this.state = state;
+            ws.send(new V8Event("Debugger.resumed", new JSONMap()));
+            updateNotifier.next();
+        }
+        catch (IOException e) {
+            ws.close();
+            close();
+        }
     }
     private void pauseDebug(Context ctx, Breakpoint bp) {
-        state = State.PAUSED_NORMAL;
-        var map = new JSONMap()
-            .set("callFrames", serializeFrames(ctx))
-            .set("reason", "debugCommand");
+        try {
+            state = State.PAUSED_NORMAL;
+            var map = new JSONMap()
+                .set("callFrames", serializeFrames(ctx))
+                .set("reason", "debugCommand");
 
-        if (bp != null) map.set("hitBreakpoints", new JSONList().add(bp.id + ""));
-        ws.send(new V8Event("Debugger.paused", map));
+            if (bp != null) map.set("hitBreakpoints", new JSONList().add(bp.id + ""));
+            ws.send(new V8Event("Debugger.paused", map));
+        }
+        catch (IOException e) {
+            ws.close();
+            close();
+        }
     }
     private void pauseException(Context ctx) {
-        state = State.PAUSED_EXCEPTION;
-        var map = new JSONMap()
-            .set("callFrames", serializeFrames(ctx))
-            .set("reason", "exception");
+        try {
+            state = State.PAUSED_EXCEPTION;
+            var map = new JSONMap()
+                .set("callFrames", serializeFrames(ctx))
+                .set("reason", "exception");
 
-        ws.send(new V8Event("Debugger.paused", map));
+            ws.send(new V8Event("Debugger.paused", map));
+        }
+        catch (IOException e) {
+            ws.close();
+            close();
+        }
     }
 
-    private void sendSource(Source src) {
-        ws.send(new V8Event("Debugger.scriptParsed", new JSONMap()
-            .set("scriptId", src.id + "")
-            .set("hash", src.source.hashCode())
-            .set("url", src.filename + "")
-        ));
+    private void sendSource(Source src){
+        try {
+            ws.send(new V8Event("Debugger.scriptParsed", new JSONMap()
+                .set("scriptId", src.id + "")
+                .set("hash", src.source.hashCode())
+                .set("url", src.filename + "")
+            ));
+        }
+        catch (IOException e) {
+            ws.close();
+            close();
+        }
     }
 
     private void addBreakpoint(Breakpoint bpt) {
-        idToBreakpoint.put(bpt.id, bpt);
-        locToBreakpoint.put(bpt.location, bpt);
+        try {
+            idToBreakpoint.put(bpt.id, bpt);
+            locToBreakpoint.put(bpt.location, bpt);
 
-        ws.send(new V8Event("Debugger.breakpointResolved", new JSONMap()
-            .set("breakpointId", bpt.id)
-            .set("location", serializeLocation(bpt.location))
-        ));
+            ws.send(new V8Event("Debugger.breakpointResolved", new JSONMap()
+                .set("breakpointId", bpt.id)
+                .set("location", serializeLocation(bpt.location))
+            ));
+        }
+        catch (IOException e) {
+            ws.close();
+            close();
+        }
     }
 
     private RunResult run(Frame codeFrame, String code) {
         if (codeFrame == null) return new RunResult(null, code, new EngineException("Invalid code frame!"));
-        var engine = new Engine(false);
-        var env = codeFrame.func.environment.fork();
+        var engine = new Engine();
+        var env = codeFrame.func.environment.copy();
 
         env.global = new GlobalScope(codeFrame.local);
 
         var ctx = new Context(engine, env);
-        var awaiter = engine.pushMsg(false, ctx.environment(), new Filename("jscript", "eval"), code, codeFrame.frame.thisArg, codeFrame.frame.args);
+        var awaiter = engine.pushMsg(false, ctx.environment, new Filename("jscript", "eval"), code, codeFrame.frame.thisArg, codeFrame.frame.args);
 
         engine.run(true);
 
@@ -495,7 +543,7 @@ public class SimpleDebugger implements Debugger {
         var res = new ArrayValue();
         var passed = new HashSet<String>();
         var tildas = "~";
-        if (target == null) target = ctx.environment().getGlobal();
+        if (target == null) target = ctx.environment.global;
 
         for (var proto = target; proto != null && proto != Values.NULL; proto = Values.getPrototype(ctx, proto)) {
             for (var el : Values.getMembers(ctx, proto, true, true)) {
@@ -564,7 +612,7 @@ public class SimpleDebugger implements Debugger {
         return resObj;
     }
 
-    @Override public synchronized void enable(V8Message msg) {
+    @Override public synchronized void enable(V8Message msg) throws IOException {
         enabled = true;
         ws.send(msg.respond());
 
@@ -573,17 +621,45 @@ public class SimpleDebugger implements Debugger {
 
         updateNotifier.next();
     }
-    @Override public synchronized void disable(V8Message msg) {
-        enabled = false;
+    @Override public synchronized void disable(V8Message msg) throws IOException {
+        close();
         ws.send(msg.respond());
+    }
+    public synchronized void close() {
+        enabled = false;
+        execptionType = CatchType.NONE;
+        state = State.RESUMED;
+
+        idToBptCand.clear();
+
+        idToBreakpoint.clear();
+        locToBreakpoint.clear();
+        tmpBreakpts.clear();
+
+        filenameToId.clear();
+        idToSource.clear();
+        pendingSources.clear();
+
+        idToFrame.clear();
+        codeFrameToFrame.clear();
+
+        idToObject.clear();
+        objectToId.clear();
+        objectGroups.clear();
+
+        pendingPause = false;
+
+        stepOutFrame = currFrame = null;
+        stepOutPtr = 0;
+
         updateNotifier.next();
     }
 
-    @Override public synchronized void getScriptSource(V8Message msg) {
+    @Override public synchronized void getScriptSource(V8Message msg) throws IOException {
         int id = Integer.parseInt(msg.params.string("scriptId"));
         ws.send(msg.respond(new JSONMap().set("scriptSource", idToSource.get(id).source)));
     }
-    @Override public synchronized void getPossibleBreakpoints(V8Message msg) {
+    @Override public synchronized void getPossibleBreakpoints(V8Message msg) throws IOException {
         var src = idToSource.get(Integer.parseInt(msg.params.map("start").string("scriptId")));
         var start = deserializeLocation(msg.params.get("start"), false);
         var end = msg.params.isMap("end") ? deserializeLocation(msg.params.get("end"), false) : null;
@@ -598,16 +674,16 @@ public class SimpleDebugger implements Debugger {
         ws.send(msg.respond(new JSONMap().set("locations", res)));
     }
 
-    @Override public synchronized void pause(V8Message msg) {
+    @Override public synchronized void pause(V8Message msg) throws IOException {
         pendingPause = true;
         ws.send(msg.respond());
     }
-    @Override public synchronized void resume(V8Message msg) {
+    @Override public synchronized void resume(V8Message msg) throws IOException {
         resume(State.RESUMED);
         ws.send(msg.respond(new JSONMap()));
     }
 
-    @Override public synchronized void setBreakpointByUrl(V8Message msg) {
+    @Override public synchronized void setBreakpointByUrl(V8Message msg) throws IOException {
         var line = (int)msg.params.number("lineNumber") + 1;
         var col = (int)msg.params.number("columnNumber", 0) + 1;
         var cond = msg.params.string("condition", "").trim();
@@ -642,7 +718,7 @@ public class SimpleDebugger implements Debugger {
             .set("locations", locs)
         ));
     }
-    @Override public synchronized void removeBreakpoint(V8Message msg) {
+    @Override public synchronized void removeBreakpoint(V8Message msg) throws IOException {
         var id = Integer.parseInt(msg.params.string("breakpointId"));
 
         if (idToBptCand.containsKey(id)) {
@@ -659,7 +735,7 @@ public class SimpleDebugger implements Debugger {
         }
         ws.send(msg.respond());
     }
-    @Override public synchronized void continueToLocation(V8Message msg) {
+    @Override public synchronized void continueToLocation(V8Message msg) throws IOException {
         var loc = deserializeLocation(msg.params.get("location"), true);
 
         tmpBreakpts.add(loc);
@@ -668,7 +744,7 @@ public class SimpleDebugger implements Debugger {
         ws.send(msg.respond());
     }
 
-    @Override public synchronized void setPauseOnExceptions(V8Message msg) {
+    @Override public synchronized void setPauseOnExceptions(V8Message msg) throws IOException {
         switch (msg.params.string("state")) {
             case "none": execptionType = CatchType.NONE; break;
             case "all": execptionType = CatchType.ALL; break;
@@ -681,7 +757,7 @@ public class SimpleDebugger implements Debugger {
         ws.send(msg.respond());
     }
 
-    @Override public synchronized void stepInto(V8Message msg) {
+    @Override public synchronized void stepInto(V8Message msg) throws IOException {
         if (state == State.RESUMED) ws.send(new V8Error("Debugger is resumed."));
         else {
             stepOutFrame = currFrame;
@@ -690,7 +766,7 @@ public class SimpleDebugger implements Debugger {
             ws.send(msg.respond());
         }
     }
-    @Override public synchronized void stepOut(V8Message msg) {
+    @Override public synchronized void stepOut(V8Message msg) throws IOException {
         if (state == State.RESUMED) ws.send(new V8Error("Debugger is resumed."));
         else {
             stepOutFrame = currFrame;
@@ -699,7 +775,7 @@ public class SimpleDebugger implements Debugger {
             ws.send(msg.respond());
         }
     }
-    @Override public synchronized void stepOver(V8Message msg) {
+    @Override public synchronized void stepOver(V8Message msg) throws IOException {
         if (state == State.RESUMED) ws.send(new V8Error("Debugger is resumed."));
         else {
             stepOutFrame = currFrame;
@@ -709,7 +785,7 @@ public class SimpleDebugger implements Debugger {
         }
     }
 
-    @Override public synchronized void evaluateOnCallFrame(V8Message msg) {
+    @Override public synchronized void evaluateOnCallFrame(V8Message msg) throws IOException {
         var cfId = Integer.parseInt(msg.params.string("callFrameId"));
         var expr = msg.params.string("expression");
         var group = msg.params.string("objectGroup", null);
@@ -723,12 +799,12 @@ public class SimpleDebugger implements Debugger {
         else ws.send(msg.respond(new JSONMap().set("result", serializeObj(res.ctx, res.result))));
     }
 
-    @Override public synchronized void releaseObjectGroup(V8Message msg) {
+    @Override public synchronized void releaseObjectGroup(V8Message msg) throws IOException {
         var group = msg.params.string("objectGroup");
         releaseGroup(group);
         ws.send(msg.respond());
     }
-    @Override public synchronized void releaseObject(V8Message msg) {
+    @Override public synchronized void releaseObject(V8Message msg) throws IOException {
         var id = Integer.parseInt(msg.params.string("objectId"));
         var ref = idToObject.get(id);
         ref.held = false;
@@ -740,7 +816,7 @@ public class SimpleDebugger implements Debugger {
 
         ws.send(msg.respond());
     }
-    @Override public synchronized void getProperties(V8Message msg) {
+    @Override public synchronized void getProperties(V8Message msg) throws IOException {
         var ref = idToObject.get(Integer.parseInt(msg.params.string("objectId")));
         var obj = ref.obj;
 
@@ -764,7 +840,7 @@ public class SimpleDebugger implements Debugger {
                 }
                 else {
                     propDesc.set("name", Values.toString(ctx, key));
-                    propDesc.set("value", serializeObj(ctx, obj.getMember(ctx, key)));
+                    propDesc.set("value", serializeObj(ctx, Values.getMember(ctx, obj, key)));
                     propDesc.set("writable", obj.memberWritable(key));
                     propDesc.set("enumerable", obj.memberEnumerable(key));
                     propDesc.set("configurable", obj.memberConfigurable(key));
@@ -773,7 +849,7 @@ public class SimpleDebugger implements Debugger {
                 }
             }
     
-            var proto = obj.getPrototype(ctx);
+            var proto = Values.getPrototype(ctx, obj);
     
             var protoDesc = new JSONMap();
             protoDesc.set("name", "__proto__");
@@ -787,7 +863,7 @@ public class SimpleDebugger implements Debugger {
 
         ws.send(msg.respond(new JSONMap().set("result", res)));
     }
-    @Override public synchronized void callFunctionOn(V8Message msg) {
+    @Override public synchronized void callFunctionOn(V8Message msg) throws IOException {
         var src = msg.params.string("functionDeclaration");
         var args = msg.params
             .list("arguments", new JSONList())
@@ -835,7 +911,7 @@ public class SimpleDebugger implements Debugger {
         catch (EngineException e) { ws.send(msg.respond(new JSONMap().set("exceptionDetails", serializeException(ctx, e)))); }
     }
 
-    @Override public synchronized void runtimeEnable(V8Message msg) {
+    @Override public synchronized void runtimeEnable(V8Message msg) throws IOException {
         ws.send(msg.respond());
     }
 
@@ -866,18 +942,20 @@ public class SimpleDebugger implements Debugger {
         Frame frame;
 
         synchronized (this) {
-            frame = codeFrameToFrame.get(cf);
+            frame = getFrame(cf);
 
-            if (!frame.debugData) return false;
-
-            if (instruction.location != null) frame.updateLoc(ctx.engine.mapToCompiled(instruction.location));
+            if (instruction.location != null) frame.updateLoc(DebugContext.get(ctx).mapToCompiled(instruction.location));
             loc = frame.location;
             isBreakpointable = loc != null && (instruction.breakpoint.shouldStepIn());
 
             if (error != null && (execptionType == CatchType.ALL || execptionType == CatchType.UNCAUGHT && !caught)) {
                 pauseException(ctx);
             }
-            else if (loc != null && (state == State.STEPPING_IN || state == State.STEPPING_OVER) && returnVal != Runners.NO_RETURN && stepOutFrame == frame) {
+            else if (
+                loc != null &&
+                (state == State.STEPPING_IN || state == State.STEPPING_OVER) &&
+                returnVal != Values.NO_RETURN && stepOutFrame == frame
+            ) {
                 pauseDebug(ctx, null);
             }
             else if (isBreakpointable && locToBreakpoint.containsKey(loc)) {
@@ -906,7 +984,7 @@ public class SimpleDebugger implements Debugger {
                     case STEPPING_IN:
                     case STEPPING_OVER:
                         if (stepOutFrame.frame == frame.frame) {
-                            if (returnVal != Runners.NO_RETURN || error != null) {
+                            if (returnVal != Values.NO_RETURN || error != null) {
                                 state = State.STEPPING_OUT;
                                 continue;
                             }
@@ -943,7 +1021,7 @@ public class SimpleDebugger implements Debugger {
         try { idToFrame.remove(codeFrameToFrame.remove(frame).id); }
         catch (NullPointerException e) { }
 
-        if (ctx.frames().size() == 0) {
+        if (ctx.stackSize == 0) {
             if (state == State.PAUSED_EXCEPTION || state == State.PAUSED_NORMAL) resume(State.RESUMED);
         }
         else if (stepOutFrame != null && stepOutFrame.frame == frame && state == State.STEPPING_OUT) {
@@ -952,19 +1030,12 @@ public class SimpleDebugger implements Debugger {
         }
     }
 
-    @Override public synchronized void connect() {
-        if (!target.attachDebugger(this)) {
-            ws.send(new V8Error("A debugger is already attached to this engine."));
-        }
-    }
-    @Override public synchronized void disconnect() {
-        target.detachDebugger();
-        enabled = false;
-        updateNotifier.next();
+    public SimpleDebugger attach(DebugContext ctx) {
+        ctx.attachDebugger(this);
+        return this;
     }
 
-    public SimpleDebugger(WebSocket ws, Engine target) {
+    public SimpleDebugger(WebSocket ws) {
         this.ws = ws;
-        this.target = target;
     }
 }

src/me/topchetoeu/jscript/core/engine/debug/V8Error.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
-import me.topchetoeu.jscript.json.JSON;
-import me.topchetoeu.jscript.json.JSONMap;
+import me.topchetoeu.jscript.common.json.JSON;
+import me.topchetoeu.jscript.common.json.JSONMap;
 
 public class V8Error {
     public final String message;

src/me/topchetoeu/jscript/core/engine/debug/V8Event.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
-import me.topchetoeu.jscript.json.JSON;
-import me.topchetoeu.jscript.json.JSONMap;
+import me.topchetoeu.jscript.common.json.JSON;
+import me.topchetoeu.jscript.common.json.JSONMap;
 
 public class V8Event {
     public final String name;

src/me/topchetoeu/jscript/core/engine/debug/V8Message.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 import java.util.Map;
 
-import me.topchetoeu.jscript.json.JSON;
-import me.topchetoeu.jscript.json.JSONElement;
-import me.topchetoeu.jscript.json.JSONMap;
+import me.topchetoeu.jscript.common.json.JSON;
+import me.topchetoeu.jscript.common.json.JSONElement;
+import me.topchetoeu.jscript.common.json.JSONMap;
 
 public class V8Message {
     public final String name;

src/me/topchetoeu/jscript/core/engine/debug/V8Result.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
-import me.topchetoeu.jscript.json.JSON;
-import me.topchetoeu.jscript.json.JSONMap;
+import me.topchetoeu.jscript.common.json.JSON;
+import me.topchetoeu.jscript.common.json.JSONMap;
 
 public class V8Result {
     public final int id;

src/me/topchetoeu/jscript/core/engine/debug/WebSocket.java

@@ -0,0 +1,193 @@
+package me.topchetoeu.jscript.core.engine.debug;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.net.Socket;
+
+import me.topchetoeu.jscript.core.engine.debug.WebSocketMessage.Type;
+
+public class WebSocket implements AutoCloseable {
+    public long maxLength = 1 << 20;
+
+    private Socket socket;
+    private boolean closed = false;
+
+    private OutputStream out() throws IOException {
+        return socket.getOutputStream();
+    }
+    private InputStream in() throws IOException {
+        return socket.getInputStream();
+    }
+
+    private long readLen(int byteLen) throws IOException {
+        long res = 0;
+
+        if (byteLen == 126) {
+            res |= in().read() << 8;
+            res |= in().read();
+            return res;
+        }
+        else if (byteLen == 127) {
+            res |= in().read() << 56;
+            res |= in().read() << 48;
+            res |= in().read() << 40;
+            res |= in().read() << 32;
+            res |= in().read() << 24;
+            res |= in().read() << 16;
+            res |= in().read() << 8;
+            res |= in().read();
+            return res;
+        }
+        else return byteLen;
+    }
+    private byte[] readMask(boolean has) throws IOException {
+        if (has) {
+            return new byte[] {
+                (byte)in().read(),
+                (byte)in().read(),
+                (byte)in().read(),
+                (byte)in().read()
+            };
+        }
+        else return new byte[4];
+    }
+
+    private void writeLength(int len) throws IOException {
+        if (len < 126) {
+            out().write((int)len);
+        }
+        else if (len <= 0xFFFF) {
+            out().write(126);
+            out().write((int)(len >> 8) & 0xFF);
+            out().write((int)len & 0xFF);
+        }
+        else {
+            out().write(127);
+            out().write((len >> 56) & 0xFF);
+            out().write((len >> 48) & 0xFF);
+            out().write((len >> 40) & 0xFF);
+            out().write((len >> 32) & 0xFF);
+            out().write((len >> 24) & 0xFF);
+            out().write((len >> 16) & 0xFF);
+            out().write((len >> 8) & 0xFF);
+            out().write(len & 0xFF);
+        }
+    }
+    private synchronized void write(int type, byte[] data) throws IOException {
+        int i;
+
+        for (i = 0; i < data.length / 0xFFFF; i++) {
+            out().write(type);
+            writeLength(0xFFFF);
+            out().write(data, i * 0xFFFF, 0xFFFF);
+            type = 0;
+        }
+
+        out().write(type | 0x80);
+        writeLength(data.length % 0xFFFF);
+        out().write(data, i * 0xFFFF, data.length % 0xFFFF);
+    }
+
+    public void send(String data) throws IOException {
+        if (closed) throw new IllegalStateException("Object is closed.");
+        write(1, data.getBytes());
+    }
+    public void send(byte[] data) throws IOException {
+        if (closed) throw new IllegalStateException("Object is closed.");
+        write(2, data);
+    }
+    public void send(WebSocketMessage msg) throws IOException {
+        if (msg.type == Type.Binary) send(msg.binaryData());
+        else send(msg.textData());
+    }
+    public void send(Object data) throws IOException {
+        if (closed) throw new IllegalStateException("Object is closed.");
+        write(1, data.toString().getBytes());
+    }
+
+    public void close(String reason) {
+        if (socket != null) {
+            try {
+                write(8, reason.getBytes());
+                socket.close();
+            }
+            catch (Throwable e) { }
+        }
+
+        socket = null;
+        closed = true;
+    }
+    public void close() {
+        close("");
+    }
+
+    private WebSocketMessage fail(String reason) {
+        System.out.println("WebSocket Error: " + reason);
+        close(reason);
+        return null;
+    }
+
+    private byte[] readData() throws IOException {
+        var maskLen = in().read();
+        var hasMask = (maskLen & 0x80) != 0;
+        var len = (int)readLen(maskLen & 0x7F);
+        var mask = readMask(hasMask);
+
+        if (len > maxLength) fail("WebSocket Error: client exceeded configured max message size");
+        else {
+            var buff = new byte[len];
+
+            if (in().read(buff) < len) fail("WebSocket Error: payload too short");
+            else {
+                for (int i = 0; i < len; i++) {
+                    buff[i] ^= mask[(int)(i % 4)];
+                }
+                return buff;
+            }
+        }
+
+        return null;
+    }
+
+    public WebSocketMessage receive() throws IOException {
+        var data = new ByteArrayOutputStream();
+        var type = 0;
+
+        while (socket != null && !closed) {
+            var finId = in().read();
+            if (finId < 0) break;
+            var fin = (finId & 0x80) != 0;
+            int id = finId & 0x0F;
+
+            if (id == 0x8) { close(); return null; }
+            if (id >= 0x8) {
+                if (!fin) return fail("WebSocket Error: client-sent control frame was fragmented");
+                if (id == 0x9) write(0xA, data.toByteArray());
+                continue;
+            }
+
+            if (type == 0) type = id;
+            if (type == 0) return fail("WebSocket Error: client used opcode 0x00 for first fragment");
+
+            var buff = readData();
+            if (buff == null) break;
+
+            if (data.size() + buff.length > maxLength) return fail("WebSocket Error: client exceeded configured max message size");
+            data.write(buff);
+
+            if (!fin) continue;
+            var raw = data.toByteArray();
+
+            if (type == 1) return new WebSocketMessage(new String(raw));
+            else return new WebSocketMessage(raw);
+        }
+
+        return null;
+    }
+
+    public WebSocket(Socket socket) {
+        this.socket = socket;
+    }
+}

src/me/topchetoeu/jscript/core/engine/debug/WebSocketMessage.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.debug;
+package me.topchetoeu.jscript.core.engine.debug;
 
 public class WebSocketMessage {
     public static enum Type {

src/me/topchetoeu/jscript/core/engine/frame/CodeFrame.java

@@ -1,20 +1,21 @@
-package me.topchetoeu.jscript.engine.frame;
+package me.topchetoeu.jscript.core.engine.frame;
 
 import java.util.List;
 import java.util.Stack;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.scope.LocalScope;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.ScopeValue;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.exceptions.InterruptException;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.scope.LocalScope;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.ScopeValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.exceptions.InterruptException;
 
 public class CodeFrame {
     public static enum TryState {
@@ -37,8 +38,10 @@ public class CodeFrame {
             return ptr >= start && ptr < end;
         }
 
+        public void setCause(EngineException target) {
+            if (error != null) target.setCause(error);
+        }
         public TryCtx _catch(EngineException e) {
-            if (error != null) e.setCause(error);
             return new TryCtx(TryState.CATCH, e, result, restoreStackPtr, start, end, -1, finallyStart);
         }
         public TryCtx _finally(PendingResult res) {
@@ -93,13 +96,14 @@ public class CodeFrame {
     public final Object[] args;
     public final Stack<TryCtx> tryStack = new Stack<>();
     public final CodeFunction function;
+    public final Context ctx;
     public Object[] stack = new Object[32];
     public int stackPtr = 0;
     public int codePtr = 0;
     public boolean jumpFlag = false, popTryFlag = false;
     private Location prevLoc = null;
 
-    public ObjectValue getLocalScope(Context ctx, boolean props) {
+    public ObjectValue getLocalScope(boolean props) {
         var names = new String[scope.locals.length];
 
         for (int i = 0; i < scope.locals.length; i++) {
@@ -114,7 +118,7 @@ public class CodeFrame {
 
         return new ScopeValue(scope.locals, names);
     }
-    public ObjectValue getCaptureScope(Context ctx, boolean props) {
+    public ObjectValue getCaptureScope(boolean props) {
         var names = new String[scope.captures.length];
 
         for (int i = 0; i < scope.captures.length; i++) {
@@ -125,7 +129,7 @@ public class CodeFrame {
 
         return new ScopeValue(scope.captures, names);
     }
-    public ObjectValue getValStackScope(Context ctx) {
+    public ObjectValue getValStackScope() {
         return new ObjectValue() {
             @Override
             protected Object getField(Context ctx, Object key) {
@@ -177,7 +181,7 @@ public class CodeFrame {
 
         return res;
     }
-    public void push(Context ctx, Object val) {
+    public void push(Object val) {
         if (stack.length <= stackPtr) {
             var newStack = new Object[stack.length * 2];
             System.arraycopy(stack, 0, newStack, 0, stack.length);
@@ -186,20 +190,19 @@ public class CodeFrame {
         stack[stackPtr++] = Values.normalize(ctx, val);
     }
 
-    public Object next(Context ctx, Object value, Object returnValue, EngineException error) {
-        if (value != Runners.NO_RETURN) push(ctx, value);
+    public Object next(Object value, Object returnValue, EngineException error) {
+        if (value != Values.NO_RETURN) push(value);
 
         Instruction instr = null;
         if (codePtr >= 0 && codePtr < function.body.length) instr = function.body[codePtr];
 
-        if (returnValue == Runners.NO_RETURN && error == null) {
+        if (returnValue == Values.NO_RETURN && error == null) {
             try {
                 if (Thread.currentThread().isInterrupted()) throw new InterruptException();
 
                 if (instr == null) returnValue = null;
                 else {
-                // System.out.println(instr + "@" + instr.location);
-                    ctx.engine.onInstruction(ctx, this, instr, Runners.NO_RETURN, null, false);
+                    DebugContext.get(ctx).onInstruction(ctx, this, instr, Values.NO_RETURN, null, false);
 
                     if (instr.location != null) prevLoc = instr.location;
 
@@ -220,10 +223,11 @@ public class CodeFrame {
             TryCtx newCtx = null;
 
             if (error != null) {
+                tryCtx.setCause(error);
                 if (tryCtx.hasCatch()) newCtx = tryCtx._catch(error);
                 else if (tryCtx.hasFinally()) newCtx = tryCtx._finally(PendingResult.ofThrow(error, instr));
             }
-            else if (returnValue != Runners.NO_RETURN) {
+            else if (returnValue != Values.NO_RETURN) {
                 if (tryCtx.hasFinally()) newCtx = tryCtx._finally(PendingResult.ofReturn(returnValue, instr));
             }
             else if (jumpFlag && !tryCtx.inBounds(codePtr)) {
@@ -250,7 +254,7 @@ public class CodeFrame {
                     tryStack.push(newCtx);
                 }
                 error = null;
-                returnValue = Runners.NO_RETURN;
+                returnValue = Values.NO_RETURN;
                 break;
             }
             else {
@@ -268,15 +272,17 @@ public class CodeFrame {
                     tryStack.pop();
                     codePtr = tryCtx.end;
                     if (tryCtx.result.instruction != null) instr = tryCtx.result.instruction;
-                    if (tryCtx.result.isJump) {
-                        codePtr = tryCtx.result.ptr;
-                        jumpFlag = true;
+                    if (!jumpFlag && returnValue == Values.NO_RETURN && error == null) {
+                        if (tryCtx.result.isJump) {
+                            codePtr = tryCtx.result.ptr;
+                            jumpFlag = true;
+                        }
+                        if (tryCtx.result.isReturn) returnValue = tryCtx.result.value;
+                        if (error == null && tryCtx.result.isThrow) {
+                            error = tryCtx.result.error;
+                        }
                     }
-                    if (tryCtx.result.isReturn) returnValue = tryCtx.result.value;
-                    if (tryCtx.result.isThrow) {
-                        error = tryCtx.result.error;
-                    }
-                    if (error != null) error.setCause(tryCtx.error);
+                    if (error != null) tryCtx.setCause(error);
                     continue;
                 }
             }
@@ -291,15 +297,22 @@ public class CodeFrame {
                 }
             }
 
-            ctx.engine.onInstruction(ctx, this, instr, null, error, caught);
+            DebugContext.get(ctx).onInstruction(ctx, this, instr, null, error, caught);
             throw error;
         }
-        if (returnValue != Runners.NO_RETURN) {
-            ctx.engine.onInstruction(ctx, this, instr, returnValue, null, false);
+        if (returnValue != Values.NO_RETURN) {
+            DebugContext.get(ctx).onInstruction(ctx, this, instr, returnValue, null, false);
             return returnValue;
         }
 
-        return Runners.NO_RETURN;
+        return Values.NO_RETURN;
+    }
+
+    public void onPush() {
+        DebugContext.get(ctx).onFramePush(ctx, this);
+    }
+    public void onPop() {
+        DebugContext.get(ctx.parent).onFramePop(ctx.parent, this);
     }
 
     public CodeFrame(Context ctx, Object thisArg, Object[] args, CodeFunction func) {
@@ -314,5 +327,6 @@ public class CodeFrame {
 
         this.thisArg = thisArg;
         this.function = func;
+        this.ctx = ctx.pushFrame(this);
     }
 }

src/me/topchetoeu/jscript/core/engine/frame/ConvertHint.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.frame;
+package me.topchetoeu.jscript.core.engine.frame;
 
 public enum ConvertHint {
     TOSTRING,

src/me/topchetoeu/jscript/core/engine/frame/Runners.java

@@ -1,22 +1,22 @@
-package me.topchetoeu.jscript.engine.frame;
+package me.topchetoeu.jscript.core.engine.frame;
 
 import java.util.Collections;
 
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Engine;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
-import me.topchetoeu.jscript.engine.values.ArrayValue;
-import me.topchetoeu.jscript.engine.values.CodeFunction;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Symbol;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.exceptions.EngineException;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Engine;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.core.engine.values.ArrayValue;
+import me.topchetoeu.jscript.core.engine.values.CodeFunction;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Symbol;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
 
 public class Runners {
-    public static final Object NO_RETURN = new Object();
-
     public static Object execReturn(Context ctx, Instruction instr, CodeFrame frame) {
         return frame.pop();
     }
@@ -32,26 +32,26 @@ public class Runners {
         var func = frame.pop();
         var thisArg = frame.pop();
 
-        frame.push(ctx, Values.call(ctx, func, thisArg, callArgs));
+        frame.push(Values.call(ctx, func, thisArg, callArgs));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execCallNew(Context ctx, Instruction instr, CodeFrame frame) {
         var callArgs = frame.take(instr.get(0));
         var funcObj = frame.pop();
 
-        frame.push(ctx, Values.callNew(ctx, funcObj, callArgs));
+        frame.push(Values.callNew(ctx, funcObj, callArgs));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execMakeVar(Context ctx, Instruction instr, CodeFrame frame) {
         var name = (String)instr.get(0);
-        ctx.environment().global.define(name);
+        ctx.environment.global.define(name);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execDefProp(Context ctx, Instruction instr, CodeFrame frame) {
         var setter = frame.pop();
@@ -59,14 +59,14 @@ public class Runners {
         var name = frame.pop();
         var obj = frame.pop();
 
-        if (getter != null && !Values.isFunction(getter)) throw EngineException.ofType("Getter must be a function or undefined.");
-        if (setter != null && !Values.isFunction(setter)) throw EngineException.ofType("Setter must be a function or undefined.");
-        if (!Values.isObject(obj)) throw EngineException.ofType("Property apply target must be an object.");
+        if (getter != null && !(getter instanceof FunctionValue)) throw EngineException.ofType("Getter must be a function or undefined.");
+        if (setter != null && !(setter instanceof FunctionValue)) throw EngineException.ofType("Setter must be a function or undefined.");
+        if (!(obj instanceof ObjectValue)) throw EngineException.ofType("Property apply target must be an object.");
         Values.object(obj).defineProperty(ctx, name, Values.function(getter), Values.function(setter), false, false);
 
-        frame.push(ctx, obj);
+        frame.push(obj);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execInstanceof(Context ctx, Instruction instr, CodeFrame frame) {
         var type = frame.pop();
@@ -74,14 +74,14 @@ public class Runners {
 
         if (!Values.isPrimitive(type)) {
             var proto = Values.getMember(ctx, type, "prototype");
-            frame.push(ctx, Values.isInstanceOf(ctx, obj, proto));
+            frame.push(Values.isInstanceOf(ctx, obj, proto));
         }
         else {
-            frame.push(ctx, false);
+            frame.push(false);
         }
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execKeys(Context ctx, Instruction instr, CodeFrame frame) {
         var val = frame.pop();
@@ -89,17 +89,17 @@ public class Runners {
         var members = Values.getMembers(ctx, val, false, false);
         Collections.reverse(members);
 
-        frame.push(ctx, null);
+        frame.push(null);
 
         for (var el : members) {
             if (el instanceof Symbol) continue;
             var obj = new ObjectValue();
             obj.defineProperty(ctx, "value", el);
-            frame.push(ctx, obj);
+            frame.push(obj);
         }
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execTryStart(Context ctx, Instruction instr, CodeFrame frame) {
@@ -111,58 +111,58 @@ public class Runners {
         int end = (int)instr.get(2) + start;
         frame.addTry(start, end, catchStart, finallyStart);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execTryEnd(Context ctx, Instruction instr, CodeFrame frame) {
         frame.popTryFlag = true;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execDup(Context ctx, Instruction instr, CodeFrame frame) {
         int count = instr.get(0);
 
         for (var i = 0; i < count; i++) {
-            frame.push(ctx, frame.peek(count - 1));
+            frame.push(frame.peek(count - 1));
         }
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadUndefined(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, null);
+        frame.push(null);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadValue(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, instr.get(0));
+        frame.push(instr.get(0));
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadVar(Context ctx, Instruction instr, CodeFrame frame) {
         var i = instr.get(0);
 
-        if (i instanceof String) frame.push(ctx, ctx.environment().global.get(ctx, (String)i));
-        else frame.push(ctx, frame.scope.get((int)i).get(ctx));
+        if (i instanceof String) frame.push(ctx.environment.global.get(ctx, (String)i));
+        else frame.push(frame.scope.get((int)i).get(ctx));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadObj(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, new ObjectValue());
+        frame.push(new ObjectValue());
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadGlob(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, ctx.environment().global.obj);
+        frame.push(ctx.environment.global.obj);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadArr(Context ctx, Instruction instr, CodeFrame frame) {
         var res = new ArrayValue();
         res.setSize(instr.get(0));
-        frame.push(ctx, res);
+        frame.push(res);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadFunc(Context ctx, Instruction instr, CodeFrame frame) {
         long id = (Long)instr.get(0);
@@ -172,40 +172,45 @@ public class Runners {
             captures[i - 1] = frame.scope.get(instr.get(i));
         }
 
-        var func = new CodeFunction(ctx.environment(), "", Engine.functions.get(id), captures);
+        var func = new CodeFunction(ctx.environment, "", Engine.functions.get(id), captures);
 
-        frame.push(ctx, func);
+        frame.push(func);
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadMember(Context ctx, Instruction instr, CodeFrame frame) {
         var key = frame.pop();
         var obj = frame.pop();
 
         try {
-            frame.push(ctx, Values.getMember(ctx, obj, key));
+            frame.push(Values.getMember(ctx, obj, key));
         }
         catch (IllegalArgumentException e) {
             throw EngineException.ofType(e.getMessage());
         }
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execLoadKeyMember(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, instr.get(0));
+        frame.push(instr.get(0));
         return execLoadMember(ctx, instr, frame);
     }
     public static Object execLoadRegEx(Context ctx, Instruction instr, CodeFrame frame) {
-        frame.push(ctx, ctx.environment().regexConstructor.call(ctx, null, instr.get(0), instr.get(1)));
+        if (ctx.hasNotNull(Environment.REGEX_CONSTR)) {
+            frame.push(Values.callNew(ctx, ctx.get(Environment.REGEX_CONSTR), instr.get(0), instr.get(1)));
+        }
+        else {
+            throw EngineException.ofSyntax("Regex is not supported.");
+        }
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execDiscard(Context ctx, Instruction instr, CodeFrame frame) {
         frame.pop();
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execStoreMember(Context ctx, Instruction instr, CodeFrame frame) {
         var val = frame.pop();
@@ -213,30 +218,30 @@ public class Runners {
         var obj = frame.pop();
 
         if (!Values.setMember(ctx, obj, key, val)) throw EngineException.ofSyntax("Can't set member '" + key + "'.");
-        if ((boolean)instr.get(0)) frame.push(ctx, val);
+        if ((boolean)instr.get(0)) frame.push(val);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execStoreVar(Context ctx, Instruction instr, CodeFrame frame) {
         var val = (boolean)instr.get(1) ? frame.peek() : frame.pop();
         var i = instr.get(0);
 
-        if (i instanceof String) ctx.environment().global.set(ctx, (String)i, val);
+        if (i instanceof String) ctx.environment.global.set(ctx, (String)i, val);
         else frame.scope.get((int)i).set(ctx, val);
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execStoreSelfFunc(Context ctx, Instruction instr, CodeFrame frame) {
         frame.scope.locals[(int)instr.get(0)].set(ctx, frame.function);
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     
     public static Object execJmp(Context ctx, Instruction instr, CodeFrame frame) {
         frame.codePtr += (int)instr.get(0);
         frame.jumpFlag = true;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execJmpIf(Context ctx, Instruction instr, CodeFrame frame) {
         if (Values.toBoolean(frame.pop())) {
@@ -244,7 +249,7 @@ public class Runners {
             frame.jumpFlag = true;
         }
         else frame.codePtr ++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execJmpIfNot(Context ctx, Instruction instr, CodeFrame frame) {
         if (Values.not(frame.pop())) {
@@ -252,37 +257,37 @@ public class Runners {
             frame.jumpFlag = true;
         }
         else frame.codePtr ++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execIn(Context ctx, Instruction instr, CodeFrame frame) {
         var obj = frame.pop();
         var index = frame.pop();
 
-        frame.push(ctx, Values.hasMember(ctx, obj, index, false));
+        frame.push(Values.hasMember(ctx, obj, index, false));
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execTypeof(Context ctx, Instruction instr, CodeFrame frame) {
         String name = instr.get(0);
         Object obj;
 
         if (name != null) {
-            if (ctx.environment().global.has(ctx, name)) {
-                obj = ctx.environment().global.get(ctx, name);
+            if (ctx.environment.global.has(ctx, name)) {
+                obj = ctx.environment.global.get(ctx, name);
             }
             else obj = null;
         }
         else obj = frame.pop();
 
-        frame.push(ctx, Values.type(obj));
+        frame.push(Values.type(obj));
 
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
     public static Object execNop(Context ctx, Instruction instr, CodeFrame frame) {
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execDelete(Context ctx, Instruction instr, CodeFrame frame) {
@@ -291,7 +296,7 @@ public class Runners {
 
         if (!Values.deleteMember(ctx, val, key)) throw EngineException.ofSyntax("Can't delete member '" + key + "'.");
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object execOperation(Context ctx, Instruction instr, CodeFrame frame) {
@@ -300,9 +305,9 @@ public class Runners {
 
         for (var i = op.operands - 1; i >= 0; i--) args[i] = frame.pop();
 
-        frame.push(ctx, Values.operation(ctx, op, args));
+        frame.push(Values.operation(ctx, op, args));
         frame.codePtr++;
-        return NO_RETURN;
+        return Values.NO_RETURN;
     }
 
     public static Object exec(Context ctx, Instruction instr, CodeFrame frame) {

src/me/topchetoeu/jscript/core/engine/scope/GlobalScope.java

@@ -1,19 +1,20 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 import java.util.HashSet;
 import java.util.Set;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.values.FunctionValue;
-import me.topchetoeu.jscript.engine.values.NativeFunction;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.exceptions.EngineException;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.values.FunctionValue;
+import me.topchetoeu.jscript.core.engine.values.NativeFunction;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
 
 public class GlobalScope implements ScopeRecord {
     public final ObjectValue obj;
 
     public boolean has(Context ctx, String name) {
-        return obj.hasMember(ctx, name, false);
+        return Values.hasMember(null, obj, name, false);
     }
     public Object getKey(String name) {
         return name;
@@ -21,7 +22,7 @@ public class GlobalScope implements ScopeRecord {
 
     public GlobalScope globalChild() {
         var obj = new ObjectValue();
-        obj.setPrototype(null, this.obj);
+        Values.setPrototype(null, obj, this.obj);
         return new GlobalScope(obj);
     }
     public LocalScopeRecord child() {
@@ -29,14 +30,14 @@ public class GlobalScope implements ScopeRecord {
     }
 
     public Object define(String name) {
-        if (obj.hasMember(null, name, true)) return name;
-        obj.defineProperty(null, name, null);
+        if (Values.hasMember(Context.NULL, obj, name, false)) return name;
+        obj.defineProperty(Context.NULL, name, null);
         return name;
     }
     public void define(String name, Variable val) {
-        obj.defineProperty(null, name,
-            new NativeFunction("get " + name, (ctx, th, a) -> val.get(ctx)),
-            new NativeFunction("set " + name, (ctx, th, args) -> { val.set(ctx, args.length > 0 ? args[0] : null); return null; }),
+        obj.defineProperty(Context.NULL, name,
+            new NativeFunction("get " + name, args -> val.get(args.ctx)),
+            new NativeFunction("set " + name, args -> { val.set(args.ctx, args.get(0)); return null; }),
             true, true
         );
     }
@@ -51,12 +52,12 @@ public class GlobalScope implements ScopeRecord {
     }
 
     public Object get(Context ctx, String name) {
-        if (!obj.hasMember(ctx, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
-        else return obj.getMember(ctx, name);
+        if (!Values.hasMember(ctx, obj, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
+        else return Values.getMember(ctx, obj, name);
     }
     public void set(Context ctx, String name, Object val) {
-        if (!obj.hasMember(ctx, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
-        if (!obj.setMember(ctx, name, val, false)) throw EngineException.ofSyntax("The global '" + name + "' is readonly.");
+        if (!Values.hasMember(ctx, obj, name, false)) throw EngineException.ofSyntax("The variable '" + name + "' doesn't exist.");
+        if (!Values.setMember(ctx, obj, name, val)) throw EngineException.ofSyntax("The global '" + name + "' is readonly.");
     }
 
     public Set<String> keys() {

src/me/topchetoeu/jscript/core/engine/scope/LocalScope.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 import java.util.ArrayList;
 

src/me/topchetoeu/jscript/core/engine/scope/LocalScopeRecord.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 import java.util.ArrayList;
 

src/me/topchetoeu/jscript/core/engine/scope/ScopeRecord.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
 public interface ScopeRecord {
     public Object getKey(String name);

src/me/topchetoeu/jscript/core/engine/scope/ValueVariable.java

@@ -1,7 +1,7 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.values.Values;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.values.Values;
 
 public class ValueVariable implements Variable {
     public boolean readonly;

src/me/topchetoeu/jscript/core/engine/scope/Variable.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.engine.scope;
+package me.topchetoeu.jscript.core.engine.scope;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 public interface Variable {
     Object get(Context ctx);

src/me/topchetoeu/jscript/core/engine/values/ArrayValue.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.Arrays;
 import java.util.Collection;
@@ -6,7 +6,7 @@ import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 // TODO: Make methods generic
 public class ArrayValue extends ObjectValue implements Iterable<Object> {
@@ -84,6 +84,8 @@ public class ArrayValue extends ObjectValue implements Iterable<Object> {
     }
     public void copyTo(Context ctx, ArrayValue arr, int sourceStart, int destStart, int count) {
         // Iterate in reverse to reallocate at most once
+        if (destStart + count > arr.size) arr.size = destStart + count;
+
         for (var i = count - 1; i >= 0; i--) {
             if (i + sourceStart < 0 || i + sourceStart >= size) arr.remove(i + destStart);
             if (values[i + sourceStart] == UNDEFINED) arr.set(ctx, i + destStart, null);

src/me/topchetoeu/jscript/core/engine/values/CodeFunction.java

@@ -1,13 +1,12 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.compilation.FunctionBody;
-import me.topchetoeu.jscript.compilation.Instruction;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.frame.CodeFrame;
-import me.topchetoeu.jscript.engine.frame.Runners;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.compilation.FunctionBody;
+import me.topchetoeu.jscript.core.compilation.Instruction;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.frame.CodeFrame;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
 
 public class CodeFunction extends FunctionValue {
     public final int localsN;
@@ -32,16 +31,17 @@ public class CodeFunction extends FunctionValue {
     @Override
     public Object call(Context ctx, Object thisArg, Object ...args) {
         var frame = new CodeFrame(ctx, thisArg, args, this);
-        try {
-            ctx.pushFrame(frame);
 
+        frame.onPush();
+
+        try {
             while (true) {
-                var res = frame.next(ctx, Runners.NO_RETURN, Runners.NO_RETURN, null);
-                if (res != Runners.NO_RETURN) return res;
+                var res = frame.next(Values.NO_RETURN, Values.NO_RETURN, null);
+                if (res != Values.NO_RETURN) return res;
             }
         }
         finally {
-            ctx.popFrame(frame);
+            frame.onPop();
         }
     }
 

src/me/topchetoeu/jscript/core/engine/values/FunctionValue.java

@@ -1,8 +1,8 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.List;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 public abstract class FunctionValue extends ObjectValue {
     public String name = "";

src/me/topchetoeu/jscript/core/engine/values/NativeFunction.java

@@ -1,17 +1,18 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.utils.interop.Arguments;
 
 public class NativeFunction extends FunctionValue {
     public static interface NativeFunctionRunner {
-        Object run(Context ctx, Object thisArg, Object[] args);
+        Object run(Arguments args);
     }
 
     public final NativeFunctionRunner action;
 
     @Override
     public Object call(Context ctx, Object thisArg, Object ...args) {
-        return action.run(ctx, thisArg, args);
+        return action.run(new Arguments(ctx, thisArg, args));
     }
 
     public NativeFunction(String name, NativeFunctionRunner action) {

src/me/topchetoeu/jscript/core/engine/values/NativeWrapper.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
 
 public class NativeWrapper extends ObjectValue {
     private static final Object NATIVE_PROTO = new Object();
@@ -8,7 +8,7 @@ public class NativeWrapper extends ObjectValue {
 
     @Override
     public ObjectValue getPrototype(Context ctx) {
-        if (prototype == NATIVE_PROTO) return ctx.environment().wrappers.getProto(wrapped.getClass());
+        if (prototype == NATIVE_PROTO) return ctx.environment.wrappers.getProto(wrapped.getClass());
         else return super.getPrototype(ctx);
     }
 

src/me/topchetoeu/jscript/core/engine/values/ObjectValue.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
@@ -6,7 +6,8 @@ import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 
-import me.topchetoeu.jscript.engine.Context;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Environment;
 
 public class ObjectValue {
     public static enum PlaceholderProto {
@@ -53,6 +54,13 @@ public class ObjectValue {
     public LinkedHashSet<Object> nonConfigurableSet = new LinkedHashSet<>();
     public LinkedHashSet<Object> nonEnumerableSet = new LinkedHashSet<>();
 
+    private Property getProperty(Context ctx, Object key) {
+        if (properties.containsKey(key)) return properties.get(key);
+        var proto = getPrototype(ctx);
+        if (proto != null) return proto.getProperty(ctx, key);
+        else return null;
+    }
+
     public final boolean memberWritable(Object key) {
         if (state == State.FROZEN) return false;
         return !values.containsKey(key) || !nonWritableSet.contains(key);
@@ -146,45 +154,18 @@ public class ObjectValue {
 
     public ObjectValue getPrototype(Context ctx) {
         try {
-            if (prototype == OBJ_PROTO) return ctx.environment().proto("object");
-            if (prototype == ARR_PROTO) return ctx.environment().proto("array");
-            if (prototype == FUNC_PROTO) return ctx.environment().proto("function");
-            if (prototype == ERR_PROTO) return ctx.environment().proto("error");
-            if (prototype == RANGE_ERR_PROTO) return ctx.environment().proto("rangeErr");
-            if (prototype == SYNTAX_ERR_PROTO) return ctx.environment().proto("syntaxErr");
-            if (prototype == TYPE_ERR_PROTO) return ctx.environment().proto("typeErr");
+            if (prototype == OBJ_PROTO) return ctx.get(Environment.OBJECT_PROTO);
+            if (prototype == ARR_PROTO) return ctx.get(Environment.ARRAY_PROTO);
+            if (prototype == FUNC_PROTO) return ctx.get(Environment.FUNCTION_PROTO);
+            if (prototype == ERR_PROTO) return ctx.get(Environment.ERROR_PROTO);
+            if (prototype == RANGE_ERR_PROTO) return ctx.get(Environment.RANGE_ERR_PROTO);
+            if (prototype == SYNTAX_ERR_PROTO) return ctx.get(Environment.SYNTAX_ERR_PROTO);
+            if (prototype == TYPE_ERR_PROTO) return ctx.get(Environment.TYPE_ERR_PROTO);
         }
         catch (NullPointerException e) { return null; }
 
         return (ObjectValue)prototype;
     }
-    public final boolean setPrototype(Context ctx, Object val) {
-        val = Values.normalize(ctx, val);
-
-        if (!extensible()) return false;
-        if (val == null || val == Values.NULL) {
-            prototype = null;
-            return true;
-        }
-        else if (Values.isObject(val)) {
-            var obj = Values.object(val);
-
-            if (ctx != null && ctx.environment() != null) {
-                if (obj == ctx.environment().proto("object")) prototype = OBJ_PROTO;
-                else if (obj == ctx.environment().proto("array")) prototype = ARR_PROTO;
-                else if (obj == ctx.environment().proto("function")) prototype = FUNC_PROTO;
-                else if (obj == ctx.environment().proto("error")) prototype = ERR_PROTO;
-                else if (obj == ctx.environment().proto("syntaxErr")) prototype = SYNTAX_ERR_PROTO;
-                else if (obj == ctx.environment().proto("typeErr")) prototype = TYPE_ERR_PROTO;
-                else if (obj == ctx.environment().proto("rangeErr")) prototype = RANGE_ERR_PROTO;
-                else prototype = obj;
-            }
-            else prototype = obj;
-
-            return true;
-        }
-        return false;
-    }
     public final boolean setPrototype(PlaceholderProto val) {
         if (!extensible()) return false;
         switch (val) {
@@ -200,18 +181,21 @@ public class ObjectValue {
         return true;
     }
 
-    protected Property getProperty(Context ctx, Object key) {
-        if (properties.containsKey(key)) return properties.get(key);
-        var proto = getPrototype(ctx);
-        if (proto != null) return proto.getProperty(ctx, key);
-        else return null;
-    }
+    /**
+     * A method, used to get the value of a field. If a property is bound to
+     * this key, but not a field, this method should return null.
+     */
     protected Object getField(Context ctx, Object key) {
         if (values.containsKey(key)) return values.get(key);
         var proto = getPrototype(ctx);
         if (proto != null) return proto.getField(ctx, key);
         else return null;
     }
+    /**
+     * Changes the value of a field, that is bound to the given key. If no field is
+     * bound to this key, a new field should be created with the given value
+     * @return Whether or not the operation was successful
+     */
     protected boolean setField(Context ctx, Object key, Object val) {
         if (val instanceof FunctionValue && ((FunctionValue)val).name.equals("")) {
             ((FunctionValue)val).name = Values.toString(ctx, key);
@@ -220,9 +204,16 @@ public class ObjectValue {
         values.put(key, val);
         return true;
     }
+    /**
+     * Deletes the field bound to the given key.
+     */
     protected void deleteField(Context ctx, Object key) {
         values.remove(key);
     }
+    /**
+     * Returns whether or not there is a field bound to the given key.
+     * This must ignore properties
+     */
     protected boolean hasField(Context ctx, Object key) {
         return values.containsKey(key);
     }
@@ -243,10 +234,6 @@ public class ObjectValue {
         }
         else return getField(ctx, key);
     }
-    public final Object getMember(Context ctx, Object key) {
-        return getMember(ctx, key, this);
-    }
-
     public final boolean setMember(Context ctx, Object key, Object val, Object thisArg, boolean onlyProps) {
         key = Values.normalize(ctx, key); val = Values.normalize(ctx, val);
 
@@ -266,10 +253,6 @@ public class ObjectValue {
         else if (nonWritableSet.contains(key)) return false;
         else return setField(ctx, key, val);
     }
-    public final boolean setMember(Context ctx, Object key, Object val, boolean onlyProps) {
-        return setMember(ctx, Values.normalize(ctx, key), Values.normalize(ctx, val), this, onlyProps);
-    }
-
     public final boolean hasMember(Context ctx, Object key, boolean own) {
         key = Values.normalize(ctx, key);
 
@@ -290,6 +273,33 @@ public class ObjectValue {
         deleteField(ctx, key);
         return true;
     }
+    public final boolean setPrototype(Context ctx, Object val) {
+        val = Values.normalize(ctx, val);
+
+        if (!extensible()) return false;
+        if (val == null || val == Values.NULL) {
+            prototype = null;
+            return true;
+        }
+        else if (val instanceof ObjectValue) {
+            var obj = Values.object(val);
+
+            if (ctx != null) {
+                if (obj == ctx.get(Environment.OBJECT_PROTO)) prototype = OBJ_PROTO;
+                else if (obj == ctx.get(Environment.ARRAY_PROTO)) prototype = ARR_PROTO;
+                else if (obj == ctx.get(Environment.FUNCTION_PROTO)) prototype = FUNC_PROTO;
+                else if (obj == ctx.get(Environment.ERROR_PROTO)) prototype = ERR_PROTO;
+                else if (obj == ctx.get(Environment.SYNTAX_ERR_PROTO)) prototype = SYNTAX_ERR_PROTO;
+                else if (obj == ctx.get(Environment.TYPE_ERR_PROTO)) prototype = TYPE_ERR_PROTO;
+                else if (obj == ctx.get(Environment.RANGE_ERR_PROTO)) prototype = RANGE_ERR_PROTO;
+                else prototype = obj;
+            }
+            else prototype = obj;
+
+            return true;
+        }
+        return false;
+    }
 
     public final ObjectValue getMemberDescriptor(Context ctx, Object key) {
         key = Values.normalize(ctx, key);

src/me/topchetoeu/jscript/core/engine/values/ScopeValue.java

@@ -1,10 +1,10 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
 import java.util.HashMap;
 import java.util.List;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.scope.ValueVariable;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.scope.ValueVariable;
 
 public class ScopeValue extends ObjectValue {
     public final ValueVariable[] variables;
@@ -23,7 +23,7 @@ public class ScopeValue extends ObjectValue {
         }
 
         var proto = getPrototype(ctx);
-        if (proto != null && proto.hasField(ctx, key) && proto.setField(ctx, key, val)) return true;
+        if (proto != null && proto.hasMember(ctx, key, false) && proto.setField(ctx, key, val)) return true;
 
         return super.setField(ctx, key, val);
     }

src/me/topchetoeu/jscript/core/engine/values/Symbol.java

@@ -0,0 +1,28 @@
+package me.topchetoeu.jscript.core.engine.values;
+
+import java.util.HashMap;
+
+public final class Symbol {
+    private static final HashMap<String, Symbol> registry = new HashMap<>();
+
+    public final String value;
+
+    public Symbol(String value) {
+        this.value = value;
+    }
+
+    @Override
+    public String toString() {
+        if (value == null) return "Symbol";
+        else return "@@" + value;
+    }
+
+    public static Symbol get(String name) {
+        if (registry.containsKey(name)) return registry.get(name);
+        else {
+            var res = new Symbol(name);
+            registry.put(name, res);
+            return res;
+        }
+    }
+}

src/me/topchetoeu/jscript/core/engine/values/Values.java

@@ -1,5 +1,7 @@
-package me.topchetoeu.jscript.engine.values;
+package me.topchetoeu.jscript.core.engine.values;
 
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
 import java.lang.reflect.Array;
 import java.math.BigDecimal;
 import java.util.ArrayList;
@@ -10,13 +12,13 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Operation;
-import me.topchetoeu.jscript.engine.frame.ConvertHint;
-import me.topchetoeu.jscript.exceptions.ConvertException;
-import me.topchetoeu.jscript.exceptions.EngineException;
-import me.topchetoeu.jscript.exceptions.SyntaxException;
-import me.topchetoeu.jscript.exceptions.UncheckedException;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.Operation;
+import me.topchetoeu.jscript.core.engine.frame.ConvertHint;
+import me.topchetoeu.jscript.core.exceptions.ConvertException;
+import me.topchetoeu.jscript.core.exceptions.EngineException;
+import me.topchetoeu.jscript.core.exceptions.SyntaxException;
 import me.topchetoeu.jscript.lib.PromiseLib;
 
 public class Values {
@@ -39,10 +41,8 @@ public class Values {
     }
 
     public static final Object NULL = new Object();
+    public static final Object NO_RETURN = new Object();
 
-    public static boolean isObject(Object val) { return val instanceof ObjectValue; }
-    public static boolean isFunction(Object val) { return val instanceof FunctionValue; }
-    public static boolean isArray(Object val) { return val instanceof ArrayValue; }
     public static boolean isWrapper(Object val) { return val instanceof NativeWrapper; }
     public static boolean isWrapper(Object val, Class<?> clazz) {
         if (!isWrapper(val)) return false;
@@ -89,8 +89,8 @@ public class Values {
     private static Object tryCallConvertFunc(Context ctx, Object obj, String name) {
         var func = getMember(ctx, obj, name);
 
-        if (func != null) {
-            var res = ((FunctionValue)func).call(ctx, obj);
+        if (func instanceof FunctionValue) {
+            var res = Values.call(ctx, func, obj);
             if (isPrimitive(res)) return res;
         }
 
@@ -136,7 +136,6 @@ public class Values {
         if (val instanceof String) {
             try { return Double.parseDouble((String)val); }
             catch (NumberFormatException e) { return Double.NaN; }
-            catch (Throwable e) { throw new UncheckedException(e); }
         }
         return Double.NaN;
     }
@@ -284,7 +283,7 @@ public class Values {
         obj = normalize(ctx, obj); key = normalize(ctx, key);
         if (obj == null) throw new IllegalArgumentException("Tried to access member of undefined.");
         if (obj == NULL) throw new IllegalArgumentException("Tried to access member of null.");
-        if (isObject(obj)) return object(obj).getMember(ctx, key);
+        if (obj instanceof ObjectValue) return ((ObjectValue)obj).getMember(ctx, key, obj);
 
         if (obj instanceof String && key instanceof Number) {
             var i = number(key);
@@ -310,7 +309,7 @@ public class Values {
         if (obj == null) throw EngineException.ofType("Tried to access member of undefined.");
         if (obj == NULL) throw EngineException.ofType("Tried to access member of null.");
         if (key != null && "__proto__".equals(key)) return setPrototype(ctx, obj, val);
-        if (isObject(obj)) return object(obj).setMember(ctx, key, val, false);
+        if (obj instanceof ObjectValue) return ((ObjectValue)obj).setMember(ctx, key, val, obj, false);
 
         var proto = getPrototype(ctx, obj);
         return proto.setMember(ctx, key, val, obj, true);
@@ -320,7 +319,7 @@ public class Values {
         obj = normalize(ctx, obj); key = normalize(ctx, key);
 
         if ("__proto__".equals(key)) return true;
-        if (isObject(obj)) return object(obj).hasMember(ctx, key, own);
+        if (obj instanceof ObjectValue) return object(obj).hasMember(ctx, key, own);
 
         if (obj instanceof String && key instanceof Number) {
             var i = number(key);
@@ -337,30 +336,35 @@ public class Values {
         if (obj == null || obj == NULL) return false;
         obj = normalize(ctx, obj); key = normalize(ctx, key);
 
-        if (isObject(obj)) return object(obj).deleteMember(ctx, key);
+        if (obj instanceof ObjectValue) return object(obj).deleteMember(ctx, key);
         else return false;
     }
     public static ObjectValue getPrototype(Context ctx, Object obj) {
         if (obj == null || obj == NULL) return null;
         obj = normalize(ctx, obj);
-        if (isObject(obj)) return object(obj).getPrototype(ctx);
+        if (obj instanceof ObjectValue) return ((ObjectValue)obj).getPrototype(ctx);
         if (ctx == null) return null;
 
-        if (obj instanceof String) return ctx.environment().proto("string");
-        else if (obj instanceof Number) return ctx.environment().proto("number");
-        else if (obj instanceof Boolean) return ctx.environment().proto("bool");
-        else if (obj instanceof Symbol) return ctx.environment().proto("symbol");
+        if (obj instanceof String) return ctx.get(Environment.STRING_PROTO);
+        else if (obj instanceof Number) return ctx.get(Environment.NUMBER_PROTO);
+        else if (obj instanceof Boolean) return ctx.get(Environment.BOOL_PROTO);
+        else if (obj instanceof Symbol) return ctx.get(Environment.SYMBOL_PROTO);
 
         return null;
     }
     public static boolean setPrototype(Context ctx, Object obj, Object proto) {
         obj = normalize(ctx, obj);
-        return isObject(obj) && object(obj).setPrototype(ctx, proto);
+        return obj instanceof ObjectValue && ((ObjectValue)obj).setPrototype(ctx, proto);
+    }
+    public static void makePrototypeChain(Context ctx, Object... chain) {
+        for(var i = 1; i < chain.length; i++) {
+            setPrototype(ctx, chain[i], chain[i - 1]);
+        }
     }
     public static List<Object> getMembers(Context ctx, Object obj, boolean own, boolean includeNonEnumerable) {  
         List<Object> res = new ArrayList<>();
 
-        if (isObject(obj)) res = object(obj).keys(includeNonEnumerable);
+        if (obj instanceof ObjectValue) res = object(obj).keys(includeNonEnumerable);
         if (obj instanceof String) {
             for (var i = 0; i < ((String)obj).length(); i++) res.add((double)i);
         }
@@ -370,7 +374,7 @@ public class Values {
 
             while (proto != null) {
                 res.addAll(proto.keys(includeNonEnumerable));
-                proto = proto.getPrototype(ctx);
+                proto = getPrototype(ctx, proto);
             }
         }
 
@@ -396,14 +400,14 @@ public class Values {
     }
 
     public static Object call(Context ctx, Object func, Object thisArg, Object ...args) {
-        if (!isFunction(func)) throw EngineException.ofType("Tried to call a non-function value.");
+        if (!(func instanceof FunctionValue)) throw EngineException.ofType("Tried to call a non-function value.");
         return function(func).call(ctx, thisArg, args);
     }
     public static Object callNew(Context ctx, Object func, Object ...args) {
         var res = new ObjectValue();
         try {
             var proto = Values.getMember(ctx, func, "prototype");
-            res.setPrototype(ctx, proto);
+            setPrototype(ctx, res, proto);
 
             var ret = call(ctx, func, res, args);
 
@@ -476,7 +480,7 @@ public class Values {
 
         if (val instanceof Class) {
             if (ctx == null) return null;
-            else return ctx.environment().wrappers.getConstr((Class<?>)val);
+            else return ctx.environment.wrappers.getConstr((Class<?>)val);
         }
 
         return new NativeWrapper(val);
@@ -543,6 +547,9 @@ public class Values {
 
         if (obj == null) return null;
         if (clazz.isInstance(obj)) return (T)obj;
+        if (clazz.isAssignableFrom(NativeWrapper.class)) {
+            return (T)new NativeWrapper(obj);
+        }
 
         throw new ConvertException(type(obj), clazz.getSimpleName());
     }
@@ -550,16 +557,16 @@ public class Values {
     public static Iterable<Object> fromJSIterator(Context ctx, Object obj) {
         return () -> {
             try {
-                var symbol = ctx.environment().symbol("Symbol.iterator");
+                var symbol = Symbol.get("Symbol.iterator");
 
                 var iteratorFunc = getMember(ctx, obj, symbol);
-                if (!isFunction(iteratorFunc)) return Collections.emptyIterator();
+                if (!(iteratorFunc instanceof FunctionValue)) return Collections.emptyIterator();
                 var iterator = iteratorFunc instanceof FunctionValue ?
                     ((FunctionValue)iteratorFunc).call(ctx, obj, obj) :
                     iteratorFunc;
                 var nextFunc = getMember(ctx, call(ctx, iteratorFunc, obj), "next");
 
-                if (!isFunction(nextFunc)) return Collections.emptyIterator();
+                if (!(nextFunc instanceof FunctionValue)) return Collections.emptyIterator();
 
                 return new Iterator<Object>() {
                     private Object value = null;
@@ -569,11 +576,11 @@ public class Values {
                     private void loadNext() {
                         if (next == null) value = null;
                         else if (consumed) {
-                            var curr = object(next.call(ctx, iterator));
+                            var curr = next.call(ctx, iterator);
                             if (curr == null) { next = null; value = null; }
-                            if (toBoolean(curr.getMember(ctx, "done"))) { next = null; value = null; }
+                            if (toBoolean(Values.getMember(ctx, curr, "done"))) { next = null; value = null; }
                             else {
-                                this.value = curr.getMember(ctx, "value");
+                                this.value = Values.getMember(ctx, curr, "value");
                                 consumed = false;
                             }
                         }
@@ -604,16 +611,16 @@ public class Values {
         var res = new ObjectValue();
 
         try {
-            var key = getMember(ctx, getMember(ctx, ctx.environment().proto("symbol"), "constructor"), "iterator");
-            res.defineProperty(ctx, key, new NativeFunction("", (_ctx, thisArg, args) -> thisArg));
+            var key = getMember(ctx, getMember(ctx, ctx.get(Environment.SYMBOL_PROTO), "constructor"), "iterator");
+            res.defineProperty(ctx, key, new NativeFunction("", args -> args.self));
         }
         catch (IllegalArgumentException | NullPointerException e) { }
 
-        res.defineProperty(ctx, "next", new NativeFunction("", (_ctx, _th, _args) -> {
+        res.defineProperty(ctx, "next", new NativeFunction("", args -> {
             if (!it.hasNext()) return new ObjectValue(ctx, Map.of("done", true));
             else {
                 var obj = new ObjectValue();
-                obj.defineProperty(_ctx, "value", it.next());
+                obj.defineProperty(args.ctx, "value", it.next());
                 return obj;
             }
         }));
@@ -629,17 +636,17 @@ public class Values {
         var res = new ObjectValue();
 
         try {
-            var key = getMemberPath(ctx, ctx.environment().proto("symbol"), "constructor", "asyncIterator");
-            res.defineProperty(ctx, key, new NativeFunction("", (_ctx, thisArg, args) -> thisArg));
+            var key = getMemberPath(ctx, ctx.get(Environment.SYMBOL_PROTO), "constructor", "asyncIterator");
+            res.defineProperty(ctx, key, new NativeFunction("", args -> args.self));
         }
         catch (IllegalArgumentException | NullPointerException e) { }
 
-        res.defineProperty(ctx, "next", new NativeFunction("", (_ctx, _th, _args) -> {
-            return PromiseLib.await(ctx, () -> {
+        res.defineProperty(ctx, "next", new NativeFunction("", args -> {
+            return PromiseLib.await(args.ctx, () -> {
                 if (!it.hasNext()) return new ObjectValue(ctx, Map.of("done", true));
                 else {
                     var obj = new ObjectValue();
-                    obj.defineProperty(_ctx, "value", it.next());
+                    obj.defineProperty(args.ctx, "value", it.next());
                     return obj;
                 }
             });
@@ -658,104 +665,107 @@ public class Values {
         if (protoObj.values.size() + protoObj.properties.size() != 1) return false;
         return true;
     }
-    private static void printValue(Context ctx, Object val, HashSet<Object> passed, int tab) {
-        if (tab == 0 && val instanceof String) {
-            System.out.print(val);
-            return;
-        }
+    private static String toReadable(Context ctx, Object val, HashSet<Object> passed, int tab) {
+        if (tab == 0 && val instanceof String) return (String)val;
 
-        if (passed.contains(val)) {
-            System.out.print("[circular]");
-            return;
-        }
+        if (passed.contains(val)) return "[circular]";
 
         var printed = true;
+        var res = new StringBuilder();
 
         if (val instanceof FunctionValue) {
-            System.out.print(val.toString());
+            res.append(val.toString());
             var loc = val instanceof CodeFunction ? ((CodeFunction)val).loc() : null;
 
-            if (loc != null) System.out.print(" @ " + loc);
+            if (loc != null) res.append(" @ " + loc);
         }
         else if (val instanceof ArrayValue) {
-            System.out.print("[");
+            res.append("[");
             var obj = ((ArrayValue)val);
             for (int i = 0; i < obj.size(); i++) {
-                if (i != 0) System.out.print(", ");
-                else System.out.print(" ");
-                if (obj.has(i)) printValue(ctx, obj.get(i), passed, tab);
-                else System.out.print("<empty>");
+                if (i != 0) res.append(", ");
+                else res.append(" ");
+                if (obj.has(i)) res.append(toReadable(ctx, obj.get(i), passed, tab));
+                else res.append("<empty>");
             }
-            System.out.print(" ] ");
+            res.append(" ] ");
         }
         else if (val instanceof NativeWrapper) {
             var obj = ((NativeWrapper)val).wrapped;
-            System.out.print("Native " + obj.toString() + " ");
+            res.append("Native " + obj.toString() + " ");
         }
         else printed = false;
 
         if (val instanceof ObjectValue) {
             if (tab > 3) {
-                System.out.print("{...}");
-                return;
+                return "{...}";
             }
+
             passed.add(val);
 
             var obj = (ObjectValue)val;
             if (obj.values.size() + obj.properties.size() == 0 || isEmptyFunc(obj)) {
-                if (!printed) System.out.println("{}");
+                if (!printed) res.append("{}\n");
             }
             else {
-                System.out.println("{");
+                res.append("{\n");
 
                 for (var el : obj.values.entrySet()) {
                     for (int i = 0; i < tab + 1; i++) System.out.print("    ");
-                    printValue(ctx, el.getKey(), passed, tab + 1);
-                    System.out.print(": ");
-                    printValue(ctx, el.getValue(), passed, tab + 1);
-                    System.out.println(",");
+                    res.append(toReadable(ctx, el.getKey(), passed, tab + 1));
+                    res.append(": ");
+                    res.append(toReadable(ctx, el.getValue(), passed, tab + 1));
+                    res.append(",\n");
                 }
                 for (var el : obj.properties.entrySet()) {
                     for (int i = 0; i < tab + 1; i++) System.out.print("    ");
-                    printValue(ctx, el.getKey(), passed, tab + 1);
-                    System.out.println(": [prop],");
+                    res.append(toReadable(ctx, el.getKey(), passed, tab + 1));
+                    res.append(": [prop],\n");
                 }
 
-                for (int i = 0; i < tab; i++) System.out.print("    ");
-                System.out.print("}");
-
+                for (int i = 0; i < tab; i++) res.append("    ");
+                res.append("}");
             }
 
             passed.remove(val);
         }
-        else if (val == null) System.out.print("undefined");
-        else if (val == Values.NULL) System.out.print("null");
-        else if (val instanceof String) System.out.print("'" + val + "'");
-        else System.out.print(Values.toString(ctx, val));
+        else if (val == null) return "undefined";
+        else if (val == Values.NULL) return "null";
+        else if (val instanceof String) return "'" + val + "'";
+        else return Values.toString(ctx, val);
+
+        return res.toString();
+    }
+
+    public static String toReadable(Context ctx, Object val) {
+        return toReadable(ctx, val, new HashSet<>(), 0);
+    }
+    public static String errorToReadable(RuntimeException err, String prefix) {
+        prefix = prefix == null ? "Uncaught" : "Uncaught " + prefix;
+        if (err instanceof EngineException) {
+            var ee = ((EngineException)err);
+            try {
+                return prefix + " " + ee.toString(new Context(ee.engine, ee.env));
+            }
+            catch (EngineException ex) {
+                return prefix + " " + toReadable(new Context(ee.engine, ee.env), ee.value);
+            }
+        }
+        else if (err instanceof SyntaxException) {
+            return prefix + " SyntaxError " + ((SyntaxException)err).msg;
+        }
+        else if (err.getCause() instanceof InterruptedException) return "";
+        else {
+            var str = new ByteArrayOutputStream();
+            err.printStackTrace(new PrintStream(str));
+
+            return prefix + " internal error " + str.toString();
+        }
     }
     public static void printValue(Context ctx, Object val) {
-        printValue(ctx, val, new HashSet<>(), 0);
+        System.out.print(toReadable(ctx, val));
     }
     public static void printError(RuntimeException err, String prefix) {
-        prefix = prefix == null ? "Uncaught" : "Uncaught " + prefix;
-        try {
-            if (err instanceof EngineException) {
-                var ee = ((EngineException)err);
-                System.out.println(prefix + " " + ee.toString(new Context(ee.engine, ee.env)));
-            }
-            else if (err instanceof SyntaxException) {
-                System.out.println("Syntax error:" + ((SyntaxException)err).msg);
-            }
-            else if (err.getCause() instanceof InterruptedException) return;
-            else {
-                System.out.println("Internal error ocurred:");
-                err.printStackTrace();
-            }
-        }
-        catch (EngineException ex) {
-            System.out.println("Uncaught ");
-            Values.printValue(null, ((EngineException)err).value);
-            System.out.println();
-        }
+        System.out.println(errorToReadable(err, prefix));
     }
 }

src/me/topchetoeu/jscript/core/exceptions/ConvertException.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
 public class ConvertException extends RuntimeException {
     public final String source, target;

src/me/topchetoeu/jscript/core/exceptions/EngineException.java

@@ -1,15 +1,16 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
 import java.util.ArrayList;
 import java.util.List;
 
-import me.topchetoeu.jscript.Location;
-import me.topchetoeu.jscript.engine.Context;
-import me.topchetoeu.jscript.engine.Engine;
-import me.topchetoeu.jscript.engine.Environment;
-import me.topchetoeu.jscript.engine.values.ObjectValue;
-import me.topchetoeu.jscript.engine.values.Values;
-import me.topchetoeu.jscript.engine.values.ObjectValue.PlaceholderProto;
+import me.topchetoeu.jscript.common.Location;
+import me.topchetoeu.jscript.core.engine.Context;
+import me.topchetoeu.jscript.core.engine.Engine;
+import me.topchetoeu.jscript.core.engine.Environment;
+import me.topchetoeu.jscript.core.engine.debug.DebugContext;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue;
+import me.topchetoeu.jscript.core.engine.values.Values;
+import me.topchetoeu.jscript.core.engine.values.ObjectValue.PlaceholderProto;
 
 public class EngineException extends RuntimeException {
     public static class StackElement {
@@ -18,13 +19,13 @@ public class EngineException extends RuntimeException {
         public final Context ctx;
 
         public boolean visible() {
-            return ctx == null || ctx.environment() == null || ctx.environment().stackVisible;
+            return ctx == null || !ctx.get(Environment.HIDE_STACK, false);
         }
         public String toString() {
             var res = "";
             var loc = location;
 
-            if (loc != null && ctx != null && ctx.engine != null) loc = ctx.engine.mapToCompiled(loc);
+            if (loc != null && ctx != null && ctx.engine != null) loc = DebugContext.get(ctx).mapToCompiled(loc);
 
             if (loc != null) res += "at " + loc.toString() + " ";
             if (function != null && !function.equals("")) res += "in " + function + " ";
@@ -37,7 +38,7 @@ public class EngineException extends RuntimeException {
             if (function.equals("")) function = null;
 
             if (ctx == null) this.ctx = null;
-            else this.ctx = new Context(ctx.engine, ctx.environment());
+            else this.ctx = new Context(ctx.engine, ctx.environment);
             this.location = location;
             this.function = function;
         }
@@ -52,7 +53,7 @@ public class EngineException extends RuntimeException {
     public EngineException add(Context ctx, String name, Location location) {
         var el = new StackElement(ctx, location, name);
         if (el.function == null && el.location == null) return this;
-        setCtx(ctx.environment(), ctx.engine);
+        setCtx(ctx.environment, ctx.engine);
         stackTrace.add(el);
         return this;
     }
@@ -65,6 +66,11 @@ public class EngineException extends RuntimeException {
         if (this.engine == null) this.engine = engine;
         return this;
     }
+    public EngineException setCtx(Context ctx) {
+        if (this.env == null) this.env = ctx.environment;
+        if (this.engine == null) this.engine = ctx.engine;
+        return this;
+    }
 
     public String toString(Context ctx) {
         var ss = new StringBuilder();

src/me/topchetoeu/jscript/core/exceptions/InterruptException.java

@@ -1,4 +1,4 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
 public class InterruptException extends RuntimeException {
     public InterruptException() { }

src/me/topchetoeu/jscript/core/exceptions/SyntaxException.java

@@ -1,6 +1,6 @@
-package me.topchetoeu.jscript.exceptions;
+package me.topchetoeu.jscript.core.exceptions;
 
-import me.topchetoeu.jscript.Location;
+import me.topchetoeu.jscript.common.Location;
 
 public class SyntaxException extends RuntimeException {
     public final Location loc;